Cayley, Neville W., author
Angus and Robertson, 1931
Buku Teks
Castro, Brian
George Allen and Unwin, 1983
Buku Teks
Strange, Morten
Periplus Editions, 1998
Buku Referensi
Kothari, Ashish
Universities Press, 2007
Buku Teks
Lima-de-Faria, Antonio, author
[, Springer], 2012
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