Paper  doi  bibtex   

@article{kim_ultrasonic_2004,
	title = {Ultrasonic assessment of rough surface contact between solids from elastoplastic loading–unloading hysteresis cycle},
	volume = {52},
	issn = {00225096},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0022509604000122},
	doi = {10.1016/j.jmps.2004.01.006},
	language = {en},
	number = {8},
	urldate = {2015-12-04TZ},
	journal = {Journal of the Mechanics and Physics of Solids},
	author = {Kim, J.-Y and Baltazar, A and Rokhlin, S.I},
	month = aug,
	year = {2004},
	pages = {1911--1934}
}