BOUNDED QUADRATIC SYSTEMS IN PLANE

[1] ANDRONOV AA, 1966, QUALITATIVE THEORY D

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

[3] DICKSON RJ, 1968, LMSCL56681 LOCKH RES

[4] LIMIT-CYCLES AND ROTATED VECTOR FIELDS [J]. ANNALS OF MATHEMATICS, 1953, 57 (01) : 15 - 31

[5] Hartman P., 2010, CLASSICS APPL MATH, V38

[6] Lefschetz S., 1957, DIFF EQUAT+

[7] GLOBAL STRUCTURE OF ORDINARY DIFFERENTIAL EQUATIONS IN THE PLANE [J]. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1954, 76 (JAN) : 127 - 148

[8] MARKUS L, 1960, ANN MATH STUDIES, P185

[9] TUNG CC, 1960, CHINESE MATH, V3, P227

[10] YEH YC, 1963, CHINESE MATH, V3, P62

[1] ANDRONOV AA, 1966, QUALITATIVE THEORY D

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

[3] DICKSON RJ, 1968, LMSCL56681 LOCKH RES

[4] LIMIT-CYCLES AND ROTATED VECTOR FIELDS [J]. ANNALS OF MATHEMATICS, 1953, 57 (01) : 15 - 31

[5] Hartman P., 2010, CLASSICS APPL MATH, V38

[6] Lefschetz S., 1957, DIFF EQUAT+

[7] GLOBAL STRUCTURE OF ORDINARY DIFFERENTIAL EQUATIONS IN THE PLANE [J]. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1954, 76 (JAN) : 127 - 148

[8] MARKUS L, 1960, ANN MATH STUDIES, P185

[9] TUNG CC, 1960, CHINESE MATH, V3, P227

[10] YEH YC, 1963, CHINESE MATH, V3, P62