Citation: Dd. Hua et al., CONNECTION BETWEEN THE EXISTENCE OF FIRST INTEGRALS AND THE PAINLEVE PROPERTY IN 2-DIMENSIONAL LOTKA-VOLTERRA AND QUADRATIC SYSTEMS, Proceedings - Royal Society. Mathematical, physical and engineering sciences, 452(1947), 1996, pp. 859-880
Citation: Dd. Hua et al., A GENERAL TIME-DEPENDENT INVARIANT FOR AND INTEGRABILITY OF THE QUADRATIC SYSTEM, Proceedings - Royal Society. Mathematical and physical sciences, 444(1922), 1994, pp. 643-650
Citation: L. Cairo et al., INVARIANTS FOR A CUBIC 3-WAVE SYSTEM, Journal of physics. A, mathematical and general, 27(15), 1994, pp. 120000547-120000551
Citation: Dd. Hua et al., TIME-INDEPENDENT INVARIANTS OF MOTION FOR THE QUADRATIC SYSTEM, Journal of physics. A, mathematical and general, 26(23), 1993, pp. 7097-7114