Sobczak, Witold. Evolution of the Compound Verb Forms of the Subjunctive Mood in Latin American Spanish Between 1701 and 2023. Vol. 16. Manufactura Hispánica Lodziense. Poland: Lodz University Press, 2024. Accessed January 30, 2026. https://press.uni.lodz.pl/index.php/wul/catalog/book/981.