edited by A. Ghosh
Bharatiya Inanpith, 1975
Buku Teks
edited by John Wain
Oxford University Press, 1990
Buku Referensi
Jonkbloet, W.J.A.
Wolters Kluwer, 1884
Buku Referensi
Barrow, Christopher J.
Essex Longman Scientific & Technical, 1987
Buku Teks
Kuiper, Edward
Butterworth, 1967
Buku Teks