İkinci Bulgar İmparatorluğu: Revizyonlar arasındaki fark

* {{Web kaynağı | url = http://fmg.ac/Projects/MedLands/BULGARIA.htm | title = Medieval Lands — Bulgaria | last = Cawley | first = Charles | workeser = | publisheryayıncı = Hosted on the website of the Foundation for Medieval Genealogy | accessdateerişimtarihi = 26 February 2012 | arşivurl = http://web.archive.org/web/20161208233318/http://fmg.ac:80/Projects/MedLands/BULGARIA.htm | arşivtarihi = 8 Aralık 2016}}

* {{Web kaynağı | url = http://sitemaker.umich.edu/mladjov/files/bulgarian_rulers.pdf | title = Detailed List of Bulgarian Rulers | last = Mladjov | first = Ian | workeser = | publisheryayıncı = | accessdateerişimtarihi = 26 February 2012 | arşivurl = http://web.archive.org/web/20151016073659/http://sitemaker.umich.edu/mladjov/files/bulgarian_rulers.pdf | arşivtarihi = 16 Ekim 2015}}

* {{Web kaynağı | 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 | workeser = | publisheryayıncı = Държавна агенция "Архиви" (State Agency "Archives" | accessdateerişimtarihi = 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}}

* {{Web kaynağı | 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 | workeser = | publisheryayıncı = Държавна агенция "Архиви" (State Agency "Archives" | accessdateerişimtarihi = 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}}

* {{Web kaynağı | url = http://www.bg-patriarshia.bg/index.php?file=history.xml | title = История на Българската православна църква (History of the Bulgarian Orthodox Church) | authoryazar = <!--Staff writer(s); no by-line.--> | website = Официален сайт на Българската патриарпия (Official Site of the Bulgarian Patriarchate) | language = Bulgarian | accessdateerişimtarihi = 2 February 2014 | arşivurl = http://web.archive.org/web/20170606050535/http://bg-patriarshia.bg/index.php?file=history.xml | arşivtarihi = 6 Haziran 2017}}