@article {37871,
	title = {Constrained chemical equilibrium and incompletely specified elemental abundance data},
	volume = {69},
	year = {1991},
	pages = {1184-1192},
	publisher = {Canadian Journal of Chemical Engineering},
	author = {Norval, G. W. and Phillips, M. j. and Missen, R. W. and Smith, W. R.}
}
