https://www.frontiersin.org/articles/10.3389/fneur.2018.00941/pdf (Publisher version)
Spitschan, M., & Wolders, T. (2018). The Method of Silent Substitution for Examining Melanopsin Contributions to Pupil Control. Frontiers in Neuroscience, 9: 941, pp. 1-11. doi:10.3389/fneur.2018.00941.