John, Fritz
Springer, 1982
Buku Teks
Petrovsky, I. G. (Ivan Georgievich)
Dover, 1991
Buku Teks
edited by Luis A. Caffarelli, Xavier Cabre, Juan Soler
Springer, 2012
eBooks
Barnes, Belinda
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Farlow, Stanley J.
John Wiley & Sons, 1982
Buku Teks