Conquista bizantina da Bulgária (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Conquista bizantina da Bulgária" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

8,394^th place

low place

1britannica.com

40^th place

17^th place

britannica.com

Britannica: The first Bulgarian empire.

google.bg

books.google.bg

A short history of the Middle Ages, G - Reference, Barbara H. Rosenwein, University of Toronto Press, 2009 ISBN 1442601043, p. 143.
A history of Byzantium, Timothy E. Gregory, John Wiley & Sons, 2011, ISBN 1444359975, p. 322.
Southeastern Europe in the Middle Ages, 500-1250, Florin Curta, Cambridge University Press, 2006, ISBN 0521815398, pp. 246-247.
East Central Europe in the Middle Ages, 1000-1500, Jean W. Sedlar, University of Washington Press, 1994, ISBN 0295972904, p. 364.
History of the Byzantine Empire, 324-1453, Aleksandr Aleksandrovich Vasilʹev, Univ. of Wisconsin Press, 1958, ISBN 0299809250,p. 320.