Sennikov, Alexander N., and Mikhail N. Kozhin. “The History of the Finnish Botanical Exploration of Russian Lapland in 1861 and 1863”. Memoranda Societatis pro Fauna et Flora Fennica 940 (May 8, 2018): 1-35. Accessed October 16, 2019. https://journal.fi/msff/article/view/70972.