Article Kyriakou, Kyriakos; Skordoulis, Constantine; (2010)
The Reception of Ernest Haeckel's Ideas in Greece (/isis/citation/CBB001220617/)

Article Halpern, Megan K.; Rogers, Hannah Star; (2013)
Inseparable Impulses: The Science and Aesthetics of Ernst Haeckel and Charley Harper (/isis/citation/CBB001201299/)

Article Hopwood, Nick; (2015)
The Cult of Amphioxus in German Darwinism; or, Our Gelatinous Ancestors in Naples' Blue and Balmy Bay (/isis/citation/CBB001510262/)

Book Gregorio, Mario A. di; (2005)
From Here to Eternity: Ernst Haeckel and Scientific Faith (/isis/citation/CBB000671261/)

Article Richards, Robert J.; (2005)
Ernst Haeckel and the Struggles over Evolution and Religion (/isis/citation/CBB000933659/)

Book Gliboff, Sander; (2008)
H. G. Bronn, Ernst Haeckel, and the Origins of German Darwinism: A Study in Translation and Transformation (/isis/citation/CBB000850350/)

Article Nöthlich, Rosemarie; Wetzel, Nadine; Hoßfeld, Uwe; Olsson, Lennart; (2006)
“Ich acquirirte das Schwein sofort, ließ nach dem Niederstechen die Pfoten abhacken u. schickte dieselben an Darwin”---Der Briefwechsel von Otto Zacharias mit Ernst Haeckel (1874--1898) (/isis/citation/CBB000933670/)

Chapter Morton, Marsha; (2009)
From Monera to Man: Ernst Haeckel, Darwinismus, and Nineteenth-Century German Art (/isis/citation/CBB001035101/)

Chapter Di Gregorio, Mario A.; (2009)
Unter Darwins Flagge: Ernst Haeckel, Carl Gegenbaur und die Evolutionäre Morphologie (/isis/citation/CBB001035236/)

Chapter Richards, Robert John; (2004)
If This Be Heresy: Haeckel's Conversion to Darwinism (/isis/citation/CBB000520041/)

Article Santos, Guilherme Francisco; de Carvalho Ramos, Maurício; (2013)
Ernst Haeckel e a sua Monografia das moneras (/isis/citation/CBB001214025/)

Book Ernst Haeckel; Valeria Maggiore; (2024)
Storia della creazione naturale. Conferenze scientifico-popolari sulla teoria dell’evoluzione in generale e su quella di Darwin, Goethe e Lamarck in particolare (/isis/citation/CBB568386188/)

Thesis Gliboff, Sander Joel; (2001)
The pebble and the planet: Paul Kammerer, Ernst Haeckel, and the meaning of Darwinism (/isis/citation/CBB001562605/)

Chapter Richards, Robert J.; (2009)
That Darwin and Haeckel Were Complicit in Nazi Biology (/isis/citation/CBB001032214/)

Article Kleeberg, Bernhard; (2007)
God-Nature Progressing: Natural Theology in German Monism (/isis/citation/CBB000850279/)

Article Nieto-Galan, Agustí; (2012)
A Republican Natural History in Spain around 1900: Odón de Buen (1863--1945) and His Audiences (/isis/citation/CBB001210317/)

Chapter Fangerau, Heiner; (2012)
Monism, Racial Hygiene, and National Socialism (/isis/citation/CBB001201843/)

Book Keiko Sato; (2015)
Hekkeru to shinka no fantaji: Ichigenron, ekoroji, keitouju ヘッケルと進化の夢:一元論,エコロジー,系統樹 Haeckel and the Fantasy of Evolution: Monism, Ecology, and the Genealogical Tree (/isis/citation/CBB052999110/)

Chapter Gliboff, Sander; (2012)
Monism and Morphology at the Turn of the Twentieth Century (/isis/citation/CBB001201838/)

Chapter Wells, Jonathan; (2003)
Haeckel's Embryos and Evolution: Setting the Record Straight (/isis/citation/CBB000501890/)