Wilson, Leslie M.; Ettress, Aneesah (2019). "Down Time: On the Art of Retreat"(PDF). Smart Museum of Art. University of Chicago. p. 29. Archived from the original(PDF) on 26 September 2020. Retrieved 6 June 2022.
"Picasso's Studio". Worcester Art Museum. Archived from the original on 29 May 2022. Retrieved 29 May 2022.
Wilson, Leslie M.; Ettress, Aneesah (2019). "Down Time: On the Art of Retreat"(PDF). Smart Museum of Art. University of Chicago. p. 29. Archived from the original(PDF) on 26 September 2020. Retrieved 6 June 2022.