Sellers, MD, PhD, FRCPC, Edward M., Reinhard Schuller, MSc, Myroslava K. Romach, MD, and G. L. A. Horbay, PhD. 2006. “Relative Abuse Potential of Opioid Formulations in Canada: A Structured Field Study”. Journal of Opioid Management 2 (4):219-27. https://doi.org/10.5055/jom.2006.0034.