Rodrigues, F. Peres <br/><br/>
Anisotropy of granites: modulus of elasticity and ultimate -strength ellipsoids joint systems, slope attitudes, and the-ir correlations / F. Peres Rodrigues. 

 - Lisboa, Portugal : Laboratorio Nacional de Engenharia Civil 
 - [12] p. 
 - Memoria; No.332 / Laboratorio Nacional de Engenharia Civil .