62
Published 2001
Springer Netherlands

64
Published 1994
Springer Netherlands

65
by Gupta, Arjun K., Varga, Tamas
Published 1993
Springer Netherlands

66
by Feinsilver, P., Schott, René
Published 1993
Springer Netherlands

67
by Bokut’, L. A., Kukin, G. P.
Published 1994
Springer Netherlands

70
Published 1991
Springer Netherlands

71
Published 1990
Springer Netherlands

72
by Guo Wenbin
Published 2000
Springer Netherlands

73
Published 1997
Springer Netherlands

74
by Vârsan, Constantin
Published 1999
Springer Netherlands

75
Published 1998
Springer Netherlands

76
Published 1998
Springer Netherlands

77
by Tuganbaev, A.A.
Published 1998
Springer Netherlands

78
by Sandor, Jozsef, Crstici, Borislav
Published 2004
Springer Netherlands

79
by Miyake, Toshitsune
Published 1989
Springer Berlin Heidelberg

80
by Popescu, Nicolae
Published 1979
Springer Netherlands