@article {37429,
	title = {Enzymatic modifications of model porphyrins and petrophyrins in asphaltenes. In : 15th Annual AOSTRA/University/Industry Technical Review Meeting and Seminar, September 30-October 2, 1990, compiled by Dagmar Losert },
	volume = {Project 692},
	year = {1990},
	note = {University of Alberta},
	institution = {AOSTRA Library and Information Services},
	author = {Fedorak, Phillip M. and Westlake, Donald W. S.}
}
