-
Kaloyan or Kalojan, also
known as Ivan I,
Ioannitsa or
Johannitsa (Bulgarian: Калоян, Йоаница; c. 1170 –
October 1207), the Romanslayer, was
emperor or...
- Търново, 1996.
Alexandru MADGEARU,
Siege Techniques Applied by the Army of
Johannitsa the
Emperor of
Romanians and Bulgarians,
between 1201 and 1207 in Relații...
-
neighbouring Prin****lity of Wallachia. Madgearu,
Alexandru (2017-01-01), "
Johannitsa (1197–1207)", The Asanids, Brill, pp. 114–174, ISBN 978-90-04-33319-2...
