Wang, Wilfried
Birkhauser, 1998
Buku Teks
Godel, Robert
Geneve Imprimerie H. Studer S.A. 1957
Buku Teks
Beatty, Charles
Harper & Brothers Publishers, 1956
Buku Teks
Putter, Irving
University of California Press, 1954
Buku Teks
edited by Henri J.M. Claessen and David S. Moyer
Foris Publications, 1988
Buku Teks