Ramachandran, Kandethody M., author
Atlantis Press, 2012
eBooks
Petrosyan, Leon A., author
World Scientific, 2016
Buku Teks
Peters, Hans, author
Springer-Verlag , 2015
eBooks
Artikel Jurnal
edited by Marcel Boyer and Richard E. Kihlstrom
North-Holland Publishing, 1984
Buku Teks