@Article{adgeo-14-165-2008,
AUTHOR = {Tanaka, H. and Fujisawa, K. and Asai, K.},
TITLE = {Identifying unstable rock blocks by measuring micro-tremors and vibration on cliffs},
JOURNAL = {Advances in Geosciences},
VOLUME = {14},
YEAR = {2008},
PAGES = {165--171},
URL = {http://www.adv-geosci.net/14/165/2008/},
DOI = {10.5194/adgeo-14-165-2008}
}