共 7 条
[1]
BATEMAN H, 1918, DIFF EQUAT, P8
[2]
CLAPHAM JC, 1962, RECREAT MATH MAG AUG, P6
[3]
INCE EL, 1944, ORDINARY DIFFERENTIA, P71
[4]
JOHNSON RA, 1960, ADV EUCLIDEAN GEOMET, P263
[5]
STEINHAUS H, 1969, MATH SNAPSHOTS, P136
[7]
1877, NOUV CORRES MATH, V3, P175