共 7 条
[1]
Alon N., 1990, A Tribute to Paul Erdos, P13
[2]
CALKIN NJ, UNPUB DIFFERENCE DEN
[3]
CALKIN NJ, UNPUB NECESSARY SUFF
[4]
Cameron P. J., 1987, LONDON MATH SOC LECT, V123, P13
[5]
Erdos P., 1965, Proc. Sympos. Pure Math., P181
[6]
GUY RK, 1980, UNSOLVED PROBLEMS NU
[7]
Hardy GodfreyHarold., 1979, An Introduction to the Theory of Numbers, V5