El-Gendi, S., & Hassan, A. (1969). Solution of Variational Problems with Bounded Control Variables. The Institute of National Planning.
Cytowanie według stylu Chicago (wyd. 17)El-Gendi, Slah, i Ahmed Hassan. Solution of Variational Problems with Bounded Control Variables. Cairo: The Institute of National Planning, 1969.
Cytowanie według stylu MLA (wyd. 9)El-Gendi, Slah, i Ahmed Hassan. Solution of Variational Problems with Bounded Control Variables. The Institute of National Planning, 1969.