@inproceedings{inproceedingscbcd33f8,
title   = {Seven years of research on tunnel shotcrete at the university of sao paulo},
author = {Figueiredo, Antonio Domingues de and Helene, Paulo R. L.},
year = {1996},
publisher = {Cbt},
booktitle   = {International Seminar on Urban Problems and Underground Solutions}
}