German

Harres, Hans-Peter and Sauerwein, and Vrbka, (1998):
Test non parametrici come statistica 'pulita': un esempio di carico di metalli pesanti sull'isola di Sardegna.
In: Ingegneria ambientale. 1998, Nr. 7/8, S. 352-361, [Article]

English

Bassey, J. O. and Onugba, and Maduabuchi, and Verhagen, and Vrbka, (1998):
Preliminary results of hydrogeological and isotopic research in the Rima River Basin, Sokoto State, N.W. Nigeria.
In: Water resources, environment and sustainable development: Proceedings of the 2nd International Conference of the Nigerian Association of Hydrologists, Abuja, Nigeria, 1998. Hrsg.: I.A. Shamonda. S. 19-20, [Conference or Workshop Item]