Stephan, B., Zinner, H., Kastner, F., & Mannschreck, A. (1990). Enantiomers of 2,2’-Spirobichromenes: Energy Barrier for Thermal Racemization during HPLC on Tribenzoylcellulose. CHIMIA, 44(10), 336. https://doi.org/10.2533/chimia.1990.336