The ZJVS development centre in Martin together with PPS Detva and in cooperation with Konstrukta Trenčín in 1957 developed a study of a light armoured personnel carrier as a carrier for artillery weapons (codename ZIHADLO).
Source : ŠTAIGL, Jan Arms Production in Slovakia in 1954 - 1960, p. 68, VOJENSKÁ HISTÓRIA 2003/1 VHÚ Bratislava
Source : ŠTAIGL, Jan Arms Production in Slovakia in 1954 - 1960, p. 68, VOJENSKÁ HISTÓRIA 2003/1 VHÚ Bratislava