Debroux, A.; Del Bigio, G. P.; Gazzano, A.; Green, C.; d'Hoop, H.; Rio, E, A.; and Van Wauwe, A. "Utilization of an analogue-to-digital linkage system in a big scientific computing centre"

Popplewell, Cicely M. (1962) Popplewell, Cicely M. (Ed.) Information Processing 62, Proceedings of the 2nd IFIP Congress, Munich, Aug. 1962. North Holland Publ. Co., 1963.  

Languages mentioned APACHE {1961} Analog simulation language