Sana, M., Leroy, G., Vaerman, JL., & Viehe, HG. (1990). The Thermal-isomerization of Bicyclic Oxazines Into Epoxyepimines - a Preliminary Theoretical-study. Canadian Journal of Chemistry, 68(9), 1625-1628. https://doi.org/10.1139/v90-251 (Original work published 1990)