Computers & Mathematics with Applications
Computers and Mathematics with Applications > 1999 > 37 > 9 > 157-163
Computers and Mathematics with Applications > 1999 > 37 > 11-12 > 213-223
Computers and Mathematics with Applications > 1999 > 37 > 9 > 157-163
Computers and Mathematics with Applications > 1999 > 37 > 11-12 > 213-223