Bihar, Past & Present: souvenir, 13th Annual Congress of Epigraphica by P. N. Ojha, Kashi Prasad Jayaswal Research Institute Mishra Pankaj, The Problem, Seminar 450 – February 1997 "The History of Bihar".
Truy cập ngày 10 tháng 4 năm 2015.  ^ Bihar, Past & Present: souvenir, 13th Annual Congress of Epigraphica by P. N. Ojha, Kashi Prasad Jayaswal Research Institute ^ Mishra Pankaj, The Problem, Seminar 450 – February 1997 ^ “The History of Bihar”.