Zakharov, Vitaly Yu., Vladimir A. Volkov, Anna N. Ivanova, Irina N. Velmozhko, y Olga B. Chirikova. 2021. «The Optimality of the Option of Abolishing Serfdom in Russia, Implemented in 1861». Revista Amazonia Investiga 10 (46):20-31. https://doi.org/10.34069/AI/2021.46.10.2.