By BAJPAI, A. C., Mustoe, L. R., Walker, D.
By Gallagher, Richard H., Glowinski, R., Gresho, P. M., Oden, J. Tinsley, Zienkiewicz, O. C.
By Smith, Ian M., Griffiths, D. V.
By Babuska, I., Zienkiewicz, O. C., Gago, J., Oliveira, E. R. de A.
By Lewis, R. W., Bettess, P., Hinton, Dr. E.
By Kreyszig, Erwin
By McQuarrie D.
By William E. Boyce, Richard C. DiPrima
By Gallagher, RH
By BAJPAI, AC
By Givoli, D.
By Pipkin
By Trudy A. Watt
By J. N. Jeffers
By David G. Kleinbaum, Mitchell Klein