Articles discussing Pratapamalla Deva
Balpur Copper-Coins of Pratapamalladeva
L. P. Pandeya Sharma · The Indian Historical Quarterly, 1927
“Bilpur has yielded 2 number of coins the most important of which are those of Pratapamalla Deva, whose coins have not yet been found anywhere.”
The Bhagavadajjukiyam