ZEXPERT - A Prolog-Based Shell for Knowledge Base Development. - Zsuzsa Farkas; Gábor Gerlei; Katalin Molnár; Gábor Umann (ICLP, 1993)

A cost-effective programmable environment for developing environmental decision support systems. - R. Paggio; Genadi Agre; Christo Dichev; Gábor Umann; T. Rozman; L. Batachia; M. Stocchero (Environ. Model. Softw., 1999)