ON THE PRESERVATION OF DIRECTION-CONVEXITY AND THE GOODMAN-SAFF CONJECTURE

[1] LEVEL SETS FOR FUNCTIONS CONVEX IN ONE DIRECTION [J]. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 1987, 100 (03) : 442 - 446

[2] Choquet G., 1945, B SCI MATH, V69, P156

[3] CLUNIE J, 1984, ANN ACAD SCI FENN-M, V9, P3

[4] DELAVALLEEPOUSS.CJ, 1908, B ACAD BELGIQUE S, V3, P193

[5] UNIVALENT FUNCTIONS CONVEX IN ONE DIRECTION [J]. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 1979, 73 (02) : 183 - 187

[6] Hengartner W., 1973, APPL ANAL, V3, P101

[7] Polya G., 1958, PAC J MATH, V8, P259, DOI 10.2140/pjm.1958.8.295

[8] Analytic functions star like in one direction [J]. AMERICAN JOURNAL OF MATHEMATICS, 1936, 58 : 465 - 472

[9] Royster W.C., 1976, PUBL MATH-DEBRECEN, V23, P339

[10] HADAMARD PRODUCTS OF SCHLICHT FUNCTIONS AND POLYA-SCHOENBERG CONJECTURE [J]. COMMENTARII MATHEMATICI HELVETICI, 1973, 48 (01) : 119 - 135

[1] LEVEL SETS FOR FUNCTIONS CONVEX IN ONE DIRECTION [J]. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 1987, 100 (03) : 442 - 446

[2] Choquet G., 1945, B SCI MATH, V69, P156

[3] CLUNIE J, 1984, ANN ACAD SCI FENN-M, V9, P3

[4] DELAVALLEEPOUSS.CJ, 1908, B ACAD BELGIQUE S, V3, P193

[5] UNIVALENT FUNCTIONS CONVEX IN ONE DIRECTION [J]. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 1979, 73 (02) : 183 - 187

[6] Hengartner W., 1973, APPL ANAL, V3, P101

[7] Polya G., 1958, PAC J MATH, V8, P259, DOI 10.2140/pjm.1958.8.295

[8] Analytic functions star like in one direction [J]. AMERICAN JOURNAL OF MATHEMATICS, 1936, 58 : 465 - 472

[9] Royster W.C., 1976, PUBL MATH-DEBRECEN, V23, P339

[10] HADAMARD PRODUCTS OF SCHLICHT FUNCTIONS AND POLYA-SCHOENBERG CONJECTURE [J]. COMMENTARII MATHEMATICI HELVETICI, 1973, 48 (01) : 119 - 135