21
by Gessel, Ira
Published 1987
Birkhäuser Boston

22
by Miyamoto, Sadaaki
Published 1990
Springer Netherlands

23
Published 1994
Springer Netherlands

24
by Kopytov, V. M., Medvedev, N. Ya
Published 1994
Springer Netherlands

25
by Mortensen, Chris
Published 1995
Springer Netherlands

26
by Gegov, Alexander
Published 1996
Springer Netherlands

27
by Zimmermann, H.-J.
Published 1996
Springer Netherlands

28
by Kolokoltsov, Vassili N., Maslov, Victor P.
Published 1997
Springer Netherlands

29
Published 1997
Springer Netherlands

30
Published 2001
Springer Netherlands

31
by Gerla, Giangiacomo
Published 2001
Springer Netherlands

32
by Gauthier, Yvon
Published 2002
Springer Netherlands

33
by Kharazishvili, A. B.
Published 1998
Springer Netherlands

34
by Kamareddine, Fairouz D.
Published 2003
Springer Netherlands

35
Published 2003
Springer Netherlands

36
by Pinus, A. G.
Published 1993
Springer Netherlands

37
by Angstenberger, Larisa
Published 2001
Springer Netherlands

38
by Dvurečenskij, Anatolij, Pulmannová, Sylvia
Published 2000
Springer Netherlands

39
Published 2000
Springer Netherlands

40
Published 2000
Springer Netherlands