QUADRATIC SYSTEMS HAVING A PARABOLA AS AN INTEGRAL CURVE

[1] Bautin N. N., 1952, MAT SBORNIK, V30, P181

[2] Bautin N. N., 1954, AM MATH SOC TRANSL, V30, P181

[3] CERKAS LA, 1978, DIFF EQUAT+, V13, P529

[4] CERKAS LA, 1977, DIFFERENTSIALNYE URA, V13, P963

[5] CERKAS LA, 1977, DIFFERENTSIALNYE URA, V13, P779

[6] CHEN GQ, 1986, 1983 P BEIJ S DIFF G

[7] Chen S., 1985, KEXUE TONGBAO, V30, P401

[8] CHIN YS, 1958, SCI SINICA, V7, P934

[9] A SURVEY OF QUADRATIC SYSTEMS [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1966, 2 (03) : 293 - &

[10] COPPEL WA, 1986, 9TH P C ORD PART DIF, V157, P52

[1] Bautin N. N., 1952, MAT SBORNIK, V30, P181

[2] Bautin N. N., 1954, AM MATH SOC TRANSL, V30, P181

[3] CERKAS LA, 1978, DIFF EQUAT+, V13, P529

[4] CERKAS LA, 1977, DIFFERENTSIALNYE URA, V13, P963

[5] CERKAS LA, 1977, DIFFERENTSIALNYE URA, V13, P779

[6] CHEN GQ, 1986, 1983 P BEIJ S DIFF G

[7] Chen S., 1985, KEXUE TONGBAO, V30, P401

[8] CHIN YS, 1958, SCI SINICA, V7, P934

[9] A SURVEY OF QUADRATIC SYSTEMS [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1966, 2 (03) : 293 - &

[10] COPPEL WA, 1986, 9TH P C ORD PART DIF, V157, P52