John, Fritz
Springer, 1982
Buku Teks SO
Petrovsky, I.G. [Ivan Georgievich]
Dover, 1991
Buku Teks SO
edited by Luis A. Caffarelli, Xavier Cabre, Juan Soler
Springer, 2012
eBooks
Farlow, Stanley J.
John Wiley & Sons, 1982
Buku Teks SO
Ames, William F.
Academic Press, 1977
Buku Teks SO