1. DEPARTMENT OF INTEGRATED DESIGN ENGINEERING; MAEBASHI INSTITUTE OF TECHNOLOGY; 460-1 KAMISADORI; MAEBASHI; 371-0816; JAPAN
2. ALFRED RENYL INSTITUTE OF MATHEMATICS; HUNGARIAN ACADEMY OF SCIENCES; BUDAPEST; P.O. BOX 127; BUDAPEST; H-1364; HUNGARY
3. GEORGIA SOUTHERN UNIVERSITY; 65 GEORGIA AVENUE ROOM 3008; STATESBORO; GEORGIA; 30460-8093; USA