21
by Fruin, R.
Published 1927
Springer Netherlands

22
by Healy, James
Published 1966
Springer Netherlands

23
by Hanke, Lewis
Published 1951
Springer Netherlands

24
by Klaveren, J. J. van
Published 1983
Springer Netherlands

25
Published 2001
Springer Netherlands

26
by Szabó, Árpád
Published 1978
Springer Netherlands

28
Published 2003
Springer Netherlands

29
by Goldish, Matt
Published 1998
Springer Netherlands

30
by Yovel, Yirmiyahu
Published 1989
Springer Netherlands

31
by Waithe, Mary Ellen
Published 1995
Springer Netherlands

32
Published 1987
Springer Netherlands

33
by Glazov, Yuri
Published 1988
Springer Netherlands

34
by Theunissen, Bert
Published 1989
Springer Netherlands

35
by Bayly, C. A.
Published 1986
Springer Netherlands

36
by Moore, Bob
Published 1986
Springer Netherlands

37
by Walton, Craig
Published 1987
Springer Netherlands

38
by Tejera, V.
Published 1987
Springer Netherlands

39
by Saxby, T. J.
Published 1987
Springer Netherlands

40
by Jaki, Stanley L.
Published 1987
Springer Netherlands