TY  - RPRT
TI  - Direct observation of frictional contacts: New insights for state-dependent properties
AU  - James H. Dieterich
AU  - B.D. Kilgore
PY  - 1994
DO  - 10.1007/bf00874332
UR  - https://pubs.usgs.gov/publication/70016962
ID  - 70016962
ER  -