https://bg.wikibooks.org/
%D0%91%D1%8A%D0%BB%D0%B3%D0%B0%D1%80%D1%81%D0%BA%D0%B8_%D0%BD%D0%B0%D1%80%D0%BE%D0%B4%D0%BD%D0%B8_%D0%BF%D1%80%D0%B8%D0%BA%D0%B0%D0%B7%D0%BA%D0%B8%D0%91%D1%8A%D0%BB%D0%B3%D0%B0%D1%80o-%D0%A4%D0%B8%D0%BD%D1%81%D0%BA%D0%B8_%D1%80%D0%B0%D0%B7%D0%B3%D0%BE%D0%B2%D0%BE%D1%80%D0%BD%D0%B8%D0%BA%D0%93%D0%BE%D1%82%D0%B2%D0%B0%D1%80%D1%81%D0%BA%D0%B0_%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0%D0%93%D1%80%D1%8A%D1%86%D0%BA%D0%B8_%D0%B5%D0%B7%D0%B8%D0%BA%D0%9A%D0%B0%D0%BA_%D0%B4%D0%B0_%D1%81%D0%B8_%D0%BA%D0%B8%D1%80%D0%B8%D0%BB%D0%B8%D0%B7%D0%B8%D1%80%D0%B0%D0%BC%D0%B5_%D0%BA%D0%BE%D0%BC%D0%BF%D1%8E%D1%82%D1%8A%D1%80%D0%B0%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%90%D0%B2%D0%B8%D0%B0%D1%86%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%90%D0%B7%D0%B1%D1%83%D0%BA%D0%B8%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%91%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%93%D0%BE%D1%82%D0%B2%D0%B0%D1%80%D1%81%D0%BA%D0%B0_%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%95%D0%B7%D0%B8%D1%86%D0%B8%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%98%D0%B7%D0%BA%D1%83%D1%81%D1%82%D0%B2%D0%BE%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%98%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9A%D0%B0%D1%80%D1%82%D0%B8%D0%BD%D0%BA%D0%B8_%D1%81_%D0%BB%D0%B8%D1%86%D0%B5%D0%BD%D0%B7_GFDL%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9A%D0%BB%D0%B5%D1%82%D1%8A%D1%87%D0%BD%D0%B0_%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9C%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9D%D0%B0%D1%87%D0%B0%D0%BB%D0%BD%D0%B0_%D0%BA%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9F%D1%80%D0%B5%D0%B4%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%B8%D1%8F_%D0%B7%D0%B0_%D0%B8%D0%B7%D1%82%D1%80%D0%B8%D0%B2%D0%B0%D0%BD%D0%B5%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9F%D1%80%D0%B8%D0%BA%D0%B0%D0%B7%D0%BA%D0%B8%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9F%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%B8%D1%80%D0%B0%D0%BD%D0%B5%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A1%D0%BB%D0%B0%D0%B2%D1%8F%D0%BD%D1%81%D0%BA%D0%B8_%D0%B5%D0%B7%D0%B8%D1%86%D0%B8%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A1%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D1%86%D0%B8_%D0%B7%D0%B0_%D0%B1%D1%8A%D1%80%D0%B7%D0%BE_%D0%B8%D0%B7%D1%82%D1%80%D0%B8%D0%B2%D0%B0%D0%BD%D0%B5%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A3%D0%B8%D0%BA%D0%B8%D0%B4%D0%B6%D1%83%D0%BD%D0%B8%D1%8A%D1%80%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A3%D0%B8%D0%BA%D0%B8%D0%B4%D0%B6%D1%83%D0%BD%D0%B8%D1%8A%D1%80_%D0%A1%D0%BB%D1%8A%D0%BD%D1%87%D0%B5%D0%B2%D0%B0_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A3%D0%B8%D0%BA%D0%B8%D0%BA%D0%BD%D0%B8%D0%B3%D0%B8%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A4%D0%BE%D1%82%D0%BE%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A6%D0%B8%D1%84%D1%80%D0%BE%D0%B2%D0%B0_%D1%84%D0%BE%D1%82%D0%BE%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D1%8F%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD%D0%B8%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD%D0%B8_%D0%B7%D0%B0_%D1%86%D0%B8%D1%82%D0%B0%D1%82%D0%B8%D0%9A%D0%BB%D0%B5%D1%82%D1%8A%D1%87%D0%BD%D0%B0_%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F%D0%9D%D0%B0%D1%87%D0%B0%D0%BB%D0%BD%D0%B0_%D1%81%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D1%86%D0%B0%D0%9D%D0%B5%D0%B2%D0%B5%D1%80%D0%BD%D0%B8%D1%82%D0%B5_%D0%BF%D1%80%D0%B8%D1%8F%D1%82%D0%B5%D0%BB%D0%B8_%D0%BD%D0%B0_%D1%81%D0%BB%D0%B0%D0%B2%D0%B8%D1%81%D1%82%D0%B0%D0%9D%D0%B5%D0%BE%D1%80%D0%B3%D0%B0%D0%BD%D0%B8%D1%87%D0%BD%D0%B0_%D1%85%D0%B8%D0%BC%D0%B8%D1%8F%D0%9F%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D0%A1%2B%2B%D0%A0%D0%B5%D1%87%D0%BD%D0%B8%D0%BA_%D0%BD%D0%B0_%D1%81%D1%85%D0%BE%D0%B4%D0%BD%D0%B8%D1%82%D0%B5_%D0%B4%D1%83%D0%BC%D0%B8_%D0%BC%D0%B5%D0%B6%D0%B4%D1%83_%D0%91%D1%8A%D0%BB%D0%B3%D0%B0%D1%80%D1%81%D0%BA%D0%B8_%D0%B8_%D0%A1%D0%B0%D0%BD%D1%81%D0%BA%D1%80%D0%B8%D1%82%D0%A0%D0%B5%D1%87%D0%BD%D0%B8%D0%BA_%D0%BD%D0%B0_%D1%82%D1%83%D1%80%D1%81%D0%BA%D0%B8%D1%82%D0%B5_%D0%B4%D1%83%D0%BC%D0%B8_%D0%B2_%D0%B1%D1%8A%D0%BB%D0%B3%D0%B0%D1%80%D1%81%D0%BA%D0%B8%D1%8F_%D0%B5%D0%B7%D0%B8%D0%BA%D0%A2%D0%B5%D0%BE%D1%80%D0%B5%D0%BC%D0%B0_%D0%BD%D0%B0_%D0%99%D1%8A%D0%BD%D0%B3_%D0%B7%D0%B0_%D0%BF%D1%80%D0%B5%D0%BA%D1%8A%D1%81%D0%BD%D0%B0%D1%82%D0%B8%D1%82%D0%B5_%D1%84%D1%83%D0%BD%D0%BA%D1%86%D0%B8%D0%B8%D0%A3%D0%B8%D0%BA%D0%B8%D0%B4%D0%B6%D1%83%D0%BD%D0%B8%D1%8A%D1%80_%D0%A1%D0%BB%D1%8A%D0%BD%D1%87%D0%B5%D0%B2%D0%B0_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0%D0%97%D0%B5%D0%BC%D1%8F%D0%A3%D0%B8%D0%BA%D0%B8%D0%BA%D0%BD%D0%B8%D0%B3%D0%B8:%D0%90%D0%B4%D0%BC%D0%B8%D0%BD%D0%B8%D1%81%D1%82%D1%80%D0%B0%D1%82%D0%BE%D1%80%D0%B8