Bittnar, Zdenek
ASCE, 1996
Buku Teks
edited by D.R.J. Owen and A.R. Luxmoore
Pineridge Press, 1980
Buku Teks
Wang, Chu-Kia
American Publishing, 1970
Buku Teks
Grove, Wendell E.
Prentice-Hall, 1966
Buku Teks
Davis, Philip J.
Academic Press, 1984
Buku Teks