H. Helal

Discovery of a big void in Khufu’s Pyramid by observation of cosmic-ray muons

Jean-Baptiste Mouret, Hideyo Kodama, Tamer Elnady, 2017, Nature.

Optimum design of a servo-controlled breathing regulator for underwater divers

Amr M. Baz, S. Kassem, H. Helal, 1984 .

Risk evaluation of rock mass sliding in El-Deir El-Bahary valley, Luxor, Egypt : Int Assoc Engng Geol Bull N42, Oct 1990, P3–9

H. Helal, T. Abdallah, 1991 .

Precise characterization of a corridor-shaped structure in Khufu’s Pyramid by observation of cosmic-ray muons

Jean-Baptiste Mouret, F. Takasaki, D. Attié, 2023, Nature Communications.

Localization and shape determination of a hidden corridor in the Great Pyramid of Giza using non-destructive testing

C. Grosse, B. Maier, Mohamed Elkarmoty, 2023, NDT & E International.

Validity of uniaxial compression tests for indirect determination of long term strength of rocks

F. Homand-Etienne, J. Josien, H. Helal, 1988 .