^"Population of capital cities and cities of 100,000 and more inhabitants".
1995 Demographic Yearbook. New York: United Nations Department for Economic and Social Information and Policy Analysis, Statistics Division. 1997. pp. 262–321.
Dimiter Mihailov & Pancho Smolenov (1986).
"Plovdiv". Bulgaria: a Guide. Translated by E. Yanev & R. Yossifova. Sofia: Collet's, Sofia Press – via Internet Archive. (fulltext)
Alexander Kiossev[in Bulgarian] (2006).
"Plovdiv". In Marcel Cornis-Pope; John Neubauer (eds.). History of the Literary Cultures of East-Central Europe. John Benjamins. pp. 124–144.
ISBN978-90-272-9340-4.
Jonathan Bloom; Sheila Blair, eds. (2009).
"Plovdiv". Grove Encyclopedia of Islamic Art & Architecture. Oxford University Press.
ISBN978-0-19-530991-1.
^"Population of capital cities and cities of 100,000 and more inhabitants".
1995 Demographic Yearbook. New York: United Nations Department for Economic and Social Information and Policy Analysis, Statistics Division. 1997. pp. 262–321.
Dimiter Mihailov & Pancho Smolenov (1986).
"Plovdiv". Bulgaria: a Guide. Translated by E. Yanev & R. Yossifova. Sofia: Collet's, Sofia Press – via Internet Archive. (fulltext)
Alexander Kiossev[in Bulgarian] (2006).
"Plovdiv". In Marcel Cornis-Pope; John Neubauer (eds.). History of the Literary Cultures of East-Central Europe. John Benjamins. pp. 124–144.
ISBN978-90-272-9340-4.
Jonathan Bloom; Sheila Blair, eds. (2009).
"Plovdiv". Grove Encyclopedia of Islamic Art & Architecture. Oxford University Press.
ISBN978-0-19-530991-1.