KLEB, Béla; TÖRÖK, Ákos. Engineering Geological Survey for Railway Extension in the Nile Valley. Periodica Polytechnica Civil Engineering, [S. l.], v. 43, n. 2, p. 127–142, 1999. Disponível em: https://pp.bme.hu/ci/article/view/670. Acesso em: 19 may. 2024.