Article Peter J. Ramberg (2016)
Popularizing Astronomy in the German Free Religious Movement, 1851–1852. Journal for the History of Astronomy (pp. 30-51). (/isis/citation/CBB137110747/) unapi

Article Hunter, Cornelius (2014)
Darwin's Principle: The Use of Contrastive Reasoning in the Confirmation of Evolution. HOPOS (pp. 106-149). (/isis/citation/CBB001421706/) unapi

Chapter Smith, Robert W. (2014)
The “Great Plan of the Visible Universe”: William Huggins, Evolutionary Naturalism and the Nature of the Nebulae. In: The Age of Scientific Naturalism: Tyndall and His Contemporaries (pp. 113-136). (/isis/citation/CBB001202318/) unapi

Article Hoskin, Michael (2011)
William Herschel and the Nebulae, Part 2: 1785--1818. Journal for the History of Astronomy (p. 321). (/isis/citation/CBB001023571/) unapi

Article Hoskin, Michael (2011)
William Herschel and the Nebulae, Part 1: 1774--1784. Journal for the History of Astronomy (p. 177). (/isis/citation/CBB001023564/) unapi

Article Kragh, Helge (2009)
Uorganisk darwinisme---Udviklingstanken i de fysiske videnskaber. Slagmark (p. 63). (/isis/citation/CBB001022218/) unapi