共 6 条
[1]
COXETER HS, 1948, RP
[3]
DIAZ JB, 1959, BVPDE, P47
[4]
PARR WE, 1960, DISSERTATION
[5]
PAYNE LE, 1955, J MATH PHYS, V33, P291
[6]
POLYA G, 1951, ANNALS MATHEMATICAL