@inproceedings{ad3dba8f3f6b4d6cb928ece43a23f9ca,
title = "UCS estimation for Maastricht limestones by needle penetration testing",
keywords = "Conf.proc. > 3 pag",
author = "DJM Ngan-Tillard and HK Engin and W Verwaal and A Mulder",
year = "2011",
doi = "doi:10.3233/978-1-60750-801-4-235",
language = "English",
isbn = "9781607508007",
publisher = "IOS Press",
pages = "235--239",
editor = "A Anagnostopoulos and M Pachakis and C Tsatsanifos",
booktitle = "Geotechnics of hard soils - Weak rocks",
address = "Netherlands",
note = "proceedings of the 15th European conference on soil mechanics and geotechnical engineering ; Conference date: 12-09-2001 Through 15-09-2011",
}