* {{citeWeb webkaynağı | url = http://fmg.ac/Projects/MedLands/BULGARIA.htm | title = Medieval Lands — Bulgaria | last = Cawley | first = Charles | work = | publisher = Hosted on the website of the Foundation for Medieval Genealogy | accessdate = 26 February 2012 | arşivurl = http://web.archive.org/web/20161208233318/http://fmg.ac:80/Projects/MedLands/BULGARIA.htm | arşivtarihi = 8 Aralık 2016}}
* {{citeWeb webkaynağı | url = http://sitemaker.umich.edu/mladjov/files/bulgarian_rulers.pdf | title = Detailed List of Bulgarian Rulers | last = Mladjov | first = Ian | work = | publisher = | accessdate = 26 February 2012 | arşivurl = http://web.archive.org/web/20151016073659/http://sitemaker.umich.edu/mladjov/files/bulgarian_rulers.pdf | arşivtarihi = 16 Ekim 2015}}
* {{citeWeb webkaynağı | url = http://www.archivesforbalkans.bg/cgi-bin/e-cms/vis/vis.pl?s=001&p=0015&g= | title = Средновековна България (VІІ–ХІV в.) (Medieval Bulgaria VII–XIV centuries) | last = Стоименов | first = Димитър | language = Bulgarian | work = | publisher = Държавна агенция "Архиви" (State Agency "Archives" | accessdate = 26 February 2012 | arşivurl = http://web.archive.org/web/20161017023555/http://www.archivesforbalkans.bg:80/cgi-bin/e-cms/vis/vis.pl?s=001&p=0015&g= | arşivtarihi = 17 Ekim 2016}}
* {{citeWeb webkaynağı | url = http://www.archivesforbalkans.bg/cgi-bin/e-cms/vis/vis.pl?s=001&p=0017&n=000001&g= | title = Грамота на цар Иван Асен ІІ, даваща свободен достъп на търговците от Дубровник във всички области на българското царство (1230 г.) (Charter of emperor Ivan Asen II giving free access to the merchants of Dubrovnik to all provinces of the Bulgarian Empire, 1230) | last = | first = | language = Bulgarian | work = | publisher = Държавна агенция "Архиви" (State Agency "Archives" | accessdate = 26 February 2012 | arşivurl = http://web.archive.org/web/20160410075947/http://archivesforbalkans.bg/cgi-bin/e-cms/vis/vis.pl?s=001&p=0017&n=000001&g= | arşivtarihi = 10 Nisan 2016}}
* {{citeWeb webkaynağı | url = http://www.bg-patriarshia.bg/index.php?file=history.xml | title = История на Българската православна църква (History of the Bulgarian Orthodox Church) | author = <!--Staff writer(s); no by-line.--> | website = Официален сайт на Българската патриарпия (Official Site of the Bulgarian Patriarchate) | language = Bulgarian | accessdate = 2 February 2014 | arşivurl = http://web.archive.org/web/20170606050535/http://bg-patriarshia.bg/index.php?file=history.xml | arşivtarihi = 6 Haziran 2017}}
