Popular Vote of 3 March 1991 on Independece of Latvia: Prehistory and Results. Latvijas Universitātes Žurnāls Vēsture, Riga, Latvia, n. 18, p. 65–79, 2024. DOI: 10.22364/luzv.18.04. Disponível em: https://journal.lu.lv/luzv/article/view/2476.. Acesso em: 8 jan. 2025.