ZIGMUNDE, Alīda; STIKUTE, Elita. Versatile Pedagogical and Social Activities of a Graduate of Riga Polytechnic Institute Jānis Stiprais (1870–1946). History of Engineering Sciences and Institutions of Higher Education, Riga, Latvia, v. 5, p. 93–106, 2021. DOI: 10.7250/HESIHE.2021.005. Disponível em: https://hesihe-journals.rtu.lv/hesihe/article/view/HESIHE.2021.005.. Acesso em: 6 mar. 2026.