Kinderlehre, David
Academic Press, 1980
Buku Referensi
Ekeland, Ivar
Society for Industrial and Applied Mathematics, 1999
eBooks
Kikuchi, Noboru
Society for Industrial and Applied Mathematics, 1988
eBooks
Kinderlehrer, David
Society for Industrial and Applied Mathematics, 2000
eBooks
Attouch, Hedy
Society for Industrial and Applied Mathematics, 2006
eBooks