In 1959, bolo to plan the technical rozvoja military techniques zaradené riešenie umiestnenia 100 mm anti-tank bezzáklzového kanóna on obrnenom transportéri TOPAS (cover názov BK-TOPAS).
Source : ŠTAIGL, Jan Zbrojná production in Slovakia in rokoch 1954 – 1960, str. 68, MILITARY HISTÓRIA 2003/1 the military history institute in Bratislava.
Source : ŠTAIGL, Jan Zbrojná production in Slovakia in rokoch 1954 – 1960, str. 68, MILITARY HISTÓRIA 2003/1 the military history institute in Bratislava.