Chartrand, Gary, author
CRC Press, 2015
Buku Teks
Kubrusly, Carlos S., author
Springer, 2012
eBooks
Carre, Bernard
Clarendon Press , 1979
Buku Teks
Gondran, Michel, author
John Wiley & Sons, 1984
Buku Teks
Gondran, Michel, author
John Wiley & Sons, 1984
Buku Teks