string title = parseBibTeX(it->second, "title");
string booktitle = parseBibTeX(it->second, "booktitle");
string chapter = parseBibTeX(it->second, "chapter");
string title = parseBibTeX(it->second, "title");
string booktitle = parseBibTeX(it->second, "booktitle");
string chapter = parseBibTeX(it->second, "chapter");