In 1959, the plan of technical development of military equipment included the solution of placing 82 mm mortar on the armored personnel carrier OT-64 SKOT (codename STOJAN).
Source : ŠTAIGL, Jan Arms production in Slovakia in 1954 - 1960, p. 68, MILITARY HISTORY 2003/1 VHÚ Bratislava
Source : ŠTAIGL, Jan Arms production in Slovakia in 1954 - 1960, p. 68, MILITARY HISTORY 2003/1 VHÚ Bratislava