Egger, P., & Egger, P. (1983). Roof stability of shallow tunnels in isotropic and jointed rock. Ecole Polytechnique Fédérale de Lausanne, Laboratoires de Mécanique des Sols et des Roches.
Chicago Style (17th ed.) CitationEgger, Peter, and Peter Egger. Roof Stability of Shallow Tunnels in Isotropic and Jointed Rock. Lausanne: Ecole Polytechnique Fédérale de Lausanne, Laboratoires de Mécanique des Sols et des Roches, 1983.
MLA (9th ed.) CitationEgger, Peter, and Peter Egger. Roof Stability of Shallow Tunnels in Isotropic and Jointed Rock. Ecole Polytechnique Fédérale de Lausanne, Laboratoires de Mécanique des Sols et des Roches, 1983.
Warning: These citations may not always be 100% accurate.