Watt 1882 - Watt G (1882) On some Undescribed and Imperfectly known Indian Species of Primula and Androsace. Journal of the Linnean Society of London, Botany 20(123-124): 1-18. doi: 10.1111/j.1095-8339.1882.tb00180.x.
There is no corrections for Primula tibetica yet.