Sivtceva–Maksimova, Praskovia Vasilievna, and Sakhayana Stepanovna Sivtseva. 2019. “TOWARD THE SCIENTIFIC RESEARCH OF A.E. KULAKOVSKY: FLORISTIC ANALYSIS OF THE NORTHERN REGION OF RUSSIA”. Amazonia Investiga 8 (21):365-71. https://amazoniainvestiga.info/index.php/amazonia/article/view/113.