Torrance, John (1976). "The Emergence of Sociology in Austria: 1885-1935". European Journal of Sociology / Archives Européennes de Sociologie / Europäisches Archiv für Soziologie. 17 (2): 185–219. doi:10.1017/S0003975600007359. ISSN0003-9756. JSTOR23998748. S2CID145285817.
Adamek, Wojciech; Radwan-Pragłowski, Janusz (2016-07-24). "Ludwik Gumplowicz: A Forgotten Classic of European Sociology". Journal of Classical Sociology. doi:10.1177/1468795X06069685. S2CID144007868.
Konieczny, Matthew J. (2015), "Gumplowicz, Ludwig (1838–1909)", The Wiley Blackwell Encyclopedia of Race, Ethnicity, and Nationalism, American Cancer Society, pp. 1–2, doi:10.1002/9781118663202.wberen065, ISBN9781118663202
Barnes, Harry E. (1919). "The Struggle of Races and Social Groups as a Factor in the Development of Political and Social Institutions: An Exposition and Critique of the Sociological System of Ludwig Gumplowicz". The Journal of Race Development. 9 (4): 394–419. doi:10.2307/29738318. ISSN1068-3380. JSTOR29738318.
Torrance, John (1976). "The Emergence of Sociology in Austria: 1885-1935". European Journal of Sociology / Archives Européennes de Sociologie / Europäisches Archiv für Soziologie. 17 (2): 185–219. doi:10.1017/S0003975600007359. ISSN0003-9756. JSTOR23998748. S2CID145285817.
Barnes, Harry E. (1919). "The Struggle of Races and Social Groups as a Factor in the Development of Political and Social Institutions: An Exposition and Critique of the Sociological System of Ludwig Gumplowicz". The Journal of Race Development. 9 (4): 394–419. doi:10.2307/29738318. ISSN1068-3380. JSTOR29738318.
Torrance, John (1976). "The Emergence of Sociology in Austria: 1885-1935". European Journal of Sociology / Archives Européennes de Sociologie / Europäisches Archiv für Soziologie. 17 (2): 185–219. doi:10.1017/S0003975600007359. ISSN0003-9756. JSTOR23998748. S2CID145285817.
Adamek, Wojciech; Radwan-Pragłowski, Janusz (2016-07-24). "Ludwik Gumplowicz: A Forgotten Classic of European Sociology". Journal of Classical Sociology. doi:10.1177/1468795X06069685. S2CID144007868.
Torrance, John (1976). "The Emergence of Sociology in Austria: 1885-1935". European Journal of Sociology / Archives Européennes de Sociologie / Europäisches Archiv für Soziologie. 17 (2): 185–219. doi:10.1017/S0003975600007359. ISSN0003-9756. JSTOR23998748. S2CID145285817.
Barnes, Harry E. (1919). "The Struggle of Races and Social Groups as a Factor in the Development of Political and Social Institutions: An Exposition and Critique of the Sociological System of Ludwig Gumplowicz". The Journal of Race Development. 9 (4): 394–419. doi:10.2307/29738318. ISSN1068-3380. JSTOR29738318.