conference paper  http://www.kln.ac.lk/fcms/ICBI2011/ICBI%20CD/ICBI%202011/Papers/A&F%20120.pdf  LL 6.6.13. Changed one of the author's surname to Heenetigala, paper (see link above) has surname as: Heenatigala, added to additional info. and as a keyword, 8.7.13-MMM.  HERDC documentation added to dark upload - HD 29/5/20