- Terminology and Knowledge Engineering (Vol. 2). 1990.
- Hans Czap, Wolfgang Nedobity, editors, Terminology and Knowledge Engineering, Second International Congress on Terminology and Knowledge Engineering, TKE 1990, 2-4 October 1990, Trier, Germany, Proceedings, Volume 1. Indeks Verlag, Frankfurt Main, 1990.
- Terminology and Knowledge Engineering (Vol. 1). 1990.
- Hans Czap, Wolfgang Nedobity, editors, Terminology and Knowledge Engineering, Second International Congress on Terminology and Knowledge Engineering, TKE 1990, 2-4 October 1990, Trier, Germany, Proceedings, Volume 2. Indeks Verlag, Frankfurt Main, 1990.
- Terminology and Knowledge Engineering (Vol. 2). 1990.