Article Richards, Robert J. (2007)
Ernst Haeckel's Alleged Anti-Semitism and Contributions to Nazi Biology. Biological Theory (p. 97). (/isis/citation/CBB001230135/) unapi

Article Alter, Stephen G. (2007)
Race, Language, and Mental Evolution in Darwin's Descent of Man. Journal of the History of the Behavioral Sciences (p. 239). (/isis/citation/CBB000772495/) unapi

Article Andrei, Gabriela (2007)
“Quelques notes sur l'œuvre d'Ernest Haeckel”: Un manuscrit inédit d'Arnold L. Montandon. Noesis: Travaux du Comité Roumain d'Histoire et de Philosophie des Sciences (p. 219). (/isis/citation/CBB000831570/) unapi

Article Kleeberg, Bernhard (2007)
God-Nature Progressing: Natural Theology in German Monism. Science in Context (p. 537). (/isis/citation/CBB000850279/) unapi

Article Levit, Georgy S.; Hoßfeld, Uwe (2006)
The Forgotten “Old-Darwinian” Synthesis: The Evolutionary Theory of Ludwig H. Plate (1862--1937). NTM: Zeitschrift für Geschichte der Naturwissenschaften, Technik und Medizin (p. 9). (/isis/citation/CBB000670835/) unapi

Article Hopwood, Nick (2006)
Pictures of Evolution and Charges of Fraud: Ernst Haeckel's Embryological Illustrations. Isis: International Review Devoted to the History of Science and Its Cultural Influences (p. 260). (/isis/citation/CBB000670195/) unapi

Book Nöthlich, Rosemarie; Weber, Heiko; Hoßfeld, Uwe; et al. (2006)
“Substanzmonismus” und/oder “Energetik”: Der Briefwechsel von Ernst Haeckel und Wilhelm Ostwald (1910 bis 1918): zum 100. Jahrestag der Gründung des Deutschen Monistenbundes. (/isis/citation/CBB000954602/) unapi

Article Nöthlich, Rosemarie; Wetzel, Nadine; Hoßfeld, Uwe; et al. (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). Annals of the History and Philosophy of Biology (p. 177). (/isis/citation/CBB000933670/) unapi

Book Rosemarie Nöthlich, Christoph Kockerbeck (2006)
Ernst Haeckel -- Wilhelm Bölsche: Kommentarband zum Briefwechsel 1887--1919. (/isis/citation/CBB000610120/) unapi

Book Breidbach, Olaf (2006)
Visions of Nature: The Art and Science of Ernst Haeckel. (/isis/citation/CBB000741537/) unapi

Book Preuss, Dirk; Hossfeld, Uwe; Breidbach, Olaf (2006)
Anthropologie nach Haeckel. (/isis/citation/CBB000774412/) unapi

Book Hoßfeld, Uwe; Breidbach, Olaf (2005)
Haeckel-Korrespondenz: Ubersicht über den Briefbestand des Ernst-Haeckel-Archivs. (/isis/citation/CBB000700738/) unapi

Thesis Sullivan, Gregory Franzis (2005)
War of the Corms: Haeckelian Bio-Politics and Oka Asajiro's “Evolution andHuman Life”. (/isis/citation/CBB001561573/) unapi

Article Hoßfeld, Uwe; Breidbach, Olaf (2005)
In the Wake of the “Darwin Correspondence”. 40.000 Letters to Ernst Haeckel Listed and Available for Study. Annals of the History and Philosophy of Biology (p. 55). (/isis/citation/CBB000933656/) unapi

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

Article Richards, Robert J. (2005)
Ernst Haeckel and the Struggles over Evolution and Religion. Annals of the History and Philosophy of Biology (p. 89). (/isis/citation/CBB000933659/) unapi

Chapter Hoßfeld, Uwe (2005)
Nationalsozialistische Wissenschaftsinstrumentalisierung: Die Rolle von Karl Astel und Lothar Stengel von Rutkowski bei der Genese des Buches “Ernst Haeckels Bluts- und Geistes-Erbe” (1936). In: Der Brief als wissenschaftshistorische Quelle (p. 171). (/isis/citation/CBB001232284/) unapi

Book Kleeberg, Bernhard (2005)
Theophysis: Ernst Haeckels Philosophie des Naturganzen. (/isis/citation/CBB000830695/) unapi

Article Olsson, Lennart; Hoßfeld, Uwe (2004)
En översikt av den internationella Haeckelreceptionen och början till en kartläggning av Ernst Haeckels svenska korrespondens. Lychnos (pp. 207-226). (/isis/citation/CBB000770381/) unapi

Chapter Richards, Robert John (2004)
If This Be Heresy: Haeckel's Conversion to Darwinism. In: Darwinian Heresies (p. 101). (/isis/citation/CBB000520041/) unapi