Hassan, O., Ledger, P., Morgan, K., Peraire, J., Hassan, O., Weatherill, N., & Ledger, P. (2003). The development of an hp-adaptive finite element procedure for electromagnetic scattering problems. Finite Elements in Analysis and Design, 39(8), pp. 751-764. doi:10.1016/S0168-874X(03)00057-X

Hassan, Oubay, P.D Ledger, K. Morgan, J. Peraire, O. Hassan, N.P Weatherill, and Paul Ledger. "The Development of an Hp-adaptive Finite Element Procedure for Electromagnetic Scattering Problems." Finite Elements in Analysis and Design 39, no. 8 (2003): 751-764.

Hassan, Oubay, et al. "The Development of an Hp-adaptive Finite Element Procedure for Electromagnetic Scattering Problems." Finite Elements in Analysis and Design 39.8 (2003): 751-764.