21
by Griffor, Edward R.
Published 1999
Elsevier

22
by Jacobs, Bart
Published 1999
Elsevier Science

23
by Mahadev, N. V. R.
Published 1995
Elsevier

24
by Rybakov, Vladimir V.
Published 1997
Elsevier

25
by Buss, Samuel R.
Published 1998
Elsevier

26
by Ericson, Thomas
Published 2001
Elsevier

27
by Fraïssé, Roland
Published 2000
Elsevier

28
by Hirsch, R.
Published 2002
North Holland/Elsevier

29
by Gabbay, Dov M.
Published 2003
Elsevier North Holland

30
by Stern, August
Published 2000
Elsevier

31
by Brady, Geraldine
Published 2000
North-Holland/Elsevier Science BV

32
by Arnold, A.
Published 2001
Elsevier

33
by Dym, Clive L.
Published 2004
Elsevier Academic Press

34
by Kounchev, Ognyan
Published 2001
Academic Press

35
by Ershov, I︠U︡riĭ Leonidovich
Published 1998
Elsevier

36
by Odifreddi, Piergiorgio
Published 1989
North-Holland

37
by Golumbic, Martin Charles
Published 2004
Elsevier

38
by Sørensen, Morten Heine
Published 2006
Elsevier

39
by Fujishige, Satoru
Published 2005
Elsevier

40
by Ferrera, J.
Published 2005
Elsevier