共 7 条
[2]
Kurzweil J., 1954, STUD MATH, V14, P214
[3]
LEDUC M, 1970, CR ACAD SCI A MATH, V270, P326
[5]
RESTREPO G, 1965, B SOC MAT MEX, V10, P47
[7]
[No title captured]