American Mathematical Monthly
Volume 87; Issue 42
|
|
4
|
|
7
|
|
15
|
|
16
|
|
17
|
|
23
|
|
25
|
|
27
|
|
28
|
|
30
|
|
31
|
|
33
|
|
35
|
|
37
|
|
38
|
|
42
|
|
44
|
|
47
|
|
57
|
|
59
|
|
66
|
|