Humi, Mayer
Pros-Kent, 1992
Buku Teks
Tovmasyan, N.E.
World Science, 1994
Buku Teks
Haberman, Richard
Pearson Prentice Hall, 2004
Buku Teks
Petrovsky, I. G. (Ivan Georgievich)
Dover, 1991
Buku Teks
edited by Luis A. Caffarelli, Xavier Cabre, Juan Soler
Springer, 2012
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