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

Chapter Krausse, Erika; (1994)
Zum Verhältnis von Carl Gegenbauer (1826-1903) und Ernst Haeckel (1834-1919): Generelle und spezielle Morphologie (/isis/citation/CBB000064428/)

Article Di Gregorio, Mario A.; (1995)
A wolf in sheep's clothing: Carl Gegenbaur, Ernst Haeckel, the vertebral theory of the skull, and the survival of Richard Owen (/isis/citation/CBB000060555/)

Article Fröber, Rosemarie; (2003)
The Anatomical Collection in Jena and the Influence of Carl Gegenbaur (/isis/citation/CBB000430233/)

Article Wegener, Daan; (2011)
“Das politische Welträtsel”: Ernst Haeckel en het Duitse liberalisme 1859--1900 (/isis/citation/CBB001251338/)

Article Levit, Georgy S.; Hossfeld, Uwe; Olsson, Lennart; (2015)
Alexei Sewertzoff and Adolf Naef: Revising Haeckel's Biogenetic Law (/isis/citation/CBB001510261/)

Article Olivier Rieppel; (2020)
Morphology and Phylogeny (/isis/citation/CBB122827069/)

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/)

Article Levit, Georgy S.; Hossfeld, Uwe; Olsson, Lennart; (2014)
The Darwinian Revolution in Germany: From Evolutionary Morphology to the Modern Synthesis (/isis/citation/CBB001500033/)

Article Hoßfeld, Uwe; Olsson, Lennart; Breidbach, Olaf; (2003)
Carl Gegenbaur (1826--1903) and His Influence on the Development of Evolutionary Morphology (/isis/citation/CBB000430229/)

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

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

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/)

Article Català-Gorgues, Jesús Ignasi; (2010)
López Piñero y los estudios sobre historia del evolucionismo (/isis/citation/CBB001021874/)

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

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