Serafim, J. L. <br/><br/>
"In situ" shear tests and triaxial tests of foundation rock-s of concrete dams / J. L. Serafim, J. J. B. Lopes. 

 - Lisboa, Portugal : Laboratorio Nacional de Engenharia Civil 
 - 7 p. 
 - Technical paper; No.190 / Laboratorio Nacional de Engenhari-a Civil .