共 5 条
[1]
HUNT RW, 1965, T AM MATH SOC, V115, P54
[2]
LEIGHTON W, 1958, T AM MATH SOC, V89, P325
[3]
LESLIE RA, 1968, THESIS U GEORGIA
[4]
Mikusinski I., 1955, ANN POL MATH, V1, P207