VERGUNOV, Victor. Graduate of Riga Polytechnic Institute, agronomist Boris Jenken (1873–1943). History of Engineering Sciences and Institutions of Higher Education, Riga, Latvia, v. 2, p. 137–156, 2018. DOI: 10.7250/HESIHE.2018.011. Disponível em: https://hesihe-journals.rtu.lv/hesihe/article/view/HESIHE.2018.011.. Acesso em: 6 mar. 2026.