Comparative evaluation of five height–diameter models developed for black spruce and jack pine stand-types in terms of goodness-of-fit, lack-of-fit and predictive ability. 2007. Newton, P.F.; Amponsah, I.G. Forest Ecology and Management 247: 149-166.
Systematic review of short-term growth responses of semi-mature black spruce and jack pine stands to nitrogen-based fertilization treatments. 2006. Newton, P.F.; Amponsah, I.G. Forest Ecology and Management 237: 1-14.
Evaluation of Weibull-based parameter prediction equation systems for black spruce and jack pine stand types within the context of developing structural stand density management diagrams. 2005. Newton, P.F.; Amponsah, I.G. Canadian Journal of Forest Research 35: 2996 - 3010.