@article {kwon2007application,
	title = {Application of essential work of fracture concept to toughness characterization of high-density polyethylene},
	journal = {Polymer Engineering \& Science},
	volume = {47},
	number = {9},
	year = {2007},
	pages = {1327{\textendash}1337},
	publisher = {Wiley Online Library},
	author = {Kwon, HJ and Jar, P-YB}
}
