Institution: | 1. Department of Mathematics, Technical University of Civil Engineering of Bucharest, B-ul Lacul Tei 124, RO-72302, Bucharest 38, Romania 2. Mathematical Institute of the Romanian Academy, P.O. Box 1-764, Bucharest, 70700-, Romania 3. Mathematical Institute of the Romanian Academy, P.O. Box 1-764, Bucharest, 70700-, Romania 4. Department of Mathematics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
|