Sorensen, Bent, author
Earthscan, 2011
Buku Teks
Pergamon Press, 1979
Buku Teks
Marchenko, Nataliya, author
Springer, 2012
eBooks
edited by Savvas Katsikides, Hardy Hanappi
Springer, 2016
Buku Teks
Armit, Ian, author
Cambridge University Press, 2012
Buku Teks