共 7 条
[2]
Mirsky L., 1960, Q J MATH, V11, P50, DOI [DOI 10.1093/QMATH/11.1.50, 10.1093/qmath/11.1.50]
[7]
Wedin P.-A., 1972, BIT (Nordisk Tidskrift for Informationsbehandling), V12, P99, DOI 10.1007/BF01932678