Willardson, Robert K.
Reinhold Pub. Co., 1962
Buku Teks
Levinstein, M.E., author
World Scientific, 1992
Buku Teks
edited by R.K. Willardson, Albert C. beer
Academic Press, 1981
Buku Teks
Okamoto, Y.
Reinhold, 1964
Buku Teks
North-Holland, 1982
Buku Teks