- Author: J. Allen S. Saxena H. P. Singh S. Singh F. Smarandache
- Language: English
- Year: 2002
- Author: Surender Singh
- Language: English
- Year: 2007
- Author: Rajiv R.P. Singh (auth.) Thomas Jue (eds.)
- Language: English
- Year: 2009
- Author: Umesh Mishra Jasprit Singh
- Language: English
- Year: 2008
- Author: Shri Singh David A. Dunmur
- Language: English
- Year: 2002
- Author: R.K. Singh and J.S. Manhas (Eds.)
- Language: English
- Year: 1993
- Author: Umesh Mishra Jasprit Singh
- Language: English
- Year: 2007
- Author: Singh D. (ed.) Yadav B.S. (ed.)
- Language: English
- Year: 1992