TAROU: Hello Mr. TAROU. Congratulations on your desire in Bulgarian. Here is a web site you might find helpful:
http://2cyr.com/?7

(in the table above text field, first raw is Cyrillic alphabet, second raw is Bulgarian alphabet written in Latin).
Also here:
http://bg.wikisource.org/wiki/%D0%9D%D0%B0%D1%80%D0%B5%D0%B4%D0%B1%D0%B0_%E2%84%96_3_%D0%B7%D0%B0_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D0%BB%D0%B8%D1%82%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D1%8F_%D0%BD%D0%B0_%D0%B1%D1%8A%D0%BB%D0%B3%D0%B0%D1%80%D1%81%D0%BA%D0%B8%D1%82%D0%B5_%D0%B3%D0%B5%D0%BE%D0%B3%D1%80%D0%B0%D1%84%D1%81%D0%BA%D0%B8_%D0%B8%D0%BC%D0%B5%D0%BD%D0%B0_%D0%BD%D0%B0_%D0%BB%D0%B0%D1%82%D0%B8%D0%BD%D0%B8%D1%86%D0%B0

and here:
http://en.wikipedia.org/wiki/Streamlined_System_for_the_Romanization_of_Bulgarian

Good luck.