Davidson, S. (2019) „Peggy Guggenheim and Howard Putzel: Partners in Purchasing“, in Drost, J. u. a. (Hrsg.) Networking Surrealism in the USA: Agents, Artists, and the Market. Heidelberg: arthistoricum.net (Passages online, 3), S. 99–118. doi:10.11588/arthistoricum.485.c7923.