Agarwal, Ranjan, and Gannon Beaulne. “Contribution Among Contract Breakers: A Case Comment on Isfeld V. Petersen Pontiac Buick GMC (Alta.) Inc.”. Alberta Law Review 53, no. 1 (1): 229. Accessed December 6, 2019. http://albertalawreview.com/index.php/ALR/article/view/286.