@article {Wong:12 March 1998:0148-9062:147,
	author = "Wong R.H.C.",
	author = "Chau K.T.",
	title = "Crack coalescence in a rock-like material containing two cracks",
	journal = "International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts",
	volume = "35",
	year = "12 March 1998",
	abstract = "",
	pages = "147-164(18)",
	url = "http://www.ingentaconnect.com/content/els/01489062/1998/00000035/00000002/art00303"
	doi = "doi:10.1016/S0148-9062(97)00303-3"
}