&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mathematical Modelling and Computational Experiments. &mdash; 1993.<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Vol. 1 No. 4. &mdash; 1993. &mdash; ISSN 1061-7590.<br><br><br><br>[ SYS NUM: 23442 ]