共 7 条
[1]
HILLE, 1924, ANN MATH, V25, P261
[2]
POLYA, 1920, GEOMETRICHES VERTEIL
[3]
RITT, 1929, T AM MATH SOC, V31, P680
[5]
SCHWENGLER, 1925, THESIS ZURICH
[7]
WILDER, 1917, T AM MATH SOC, V18, P415