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by Gao, Jie; Efrat, Alon; Fekete, Sándor P.; et al.
by Goldratt, Eliyahu M.; Ashlag, Efrat Goldratt; Thorne, Stephen R.
by Efrat, Zvi
by Schwarzer, David; Bridglall, Beatrice L.; Ates, Burcu; et al.
by Gal-Ed, Efrat; Jonas, Gernot; Neuberg, Simon
by Efrat Buchner
by Elisha Efrat
by Efrat Eizenberg
by Efrat Shoham
by Efrat, Asif