@inproceedings{inproceedingse28804e2,
title   = {Determination of concrete fracture toughness from modal dynamic response of notched beams},
author = {Ferreira, Luiz Eduardo Teixeira and Hanai, João Bento de and Vareda, Luiz Vicente and Almeida, Sandra Freire de and Silva, Amaury Ignácio da and Sousa, José Luiz Antunes de Oliveira e},
year = {2007},
publisher = {Taylor & Francis Group},
booktitle   = {International Conference on Fracture Mechanics of Concrete and Concrete Structures}
}