Frey 2022, pp. 104, 113–116. Frey, Emily (2022). "Tchaikovsky's Echoes, Chaliapin's Sobs: Aleko, Rachmaninoff, and the Contemporary". In Bullock, Philip Ross (ed.). Rachmaninoff and His World. Chicago: University of Chicago Press. pp. 101–138. ISBN978-0-226-82374-4.
Simpson 1984. Simpson, Anne (1984). "Dear Re: A Glimpse into the Six Songs of Rachmaninoff's Opus 38". College Music Symposium. 24 (1): 97–106. JSTOR40374219.