GRIŅEVIČS, Ivans. Development of Inventors’ Activities in Latvia: Inventors’ Societies, Exhibitions, Patents and the Rationalizers’ Movement. History of Engineering Sciences and Institutions of Higher Education, Riga, Latvia, v. 4, p. 31–54, 2020. DOI: 10.7250/HESIHE.2020.003. Disponível em: https://hesihe-journals.rtu.lv/hesihe/article/view/HESIHE.2020.003.. Acesso em: 6 mar. 2026.