@inbook{inbook76608ad3,
title   = {Activities of the ITA working group on sprayed concrete use},
author = {Celestino, Tarcísio Barreto and Ishida, Atsumu},
year = {2009},
publisher = {Curran},
journal   = {Shotcrete for Underground Support XI : 11th International Conference on Shotcrete for Underground Support; Davos, Switzerland, 7-10 June 2009}
}