^Hopper, Edward (1931). Edward Hopper. New York: Whitney Museum of American Art.
^Pabón, Gutierrez, Fernández, Martinez-Pietro (2013). "Linked Open Data technologies for publication of census microdata". Journal of the American Society for Information Science and Technology.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^Tziomis, Leatha (2012). Botticelli´s La Primavera: Painting the cosmos of human ideals. ProQuest, UMI Dissertations Publishing.
^"Open Data improves Democracy". SAIS Review of International Affairs. 34 (1): 59–70. 2014.
^Ferreras, Gabriel (2004). "El Calvario". Cuadernos de los amigos de Osuna.
