His Il carteggio Hänel-Baudi di Vesme per l'edizione del Codice Teodosiano ... 1987 p. 19 (Gustav Friedrich Hänel) p. 34 (professor of Roman law at the University of Leipzig)
LC manual cat. (hdg.: Haenel, Gustav Friedrich, 1792-1878)
Per Lutherum rei christianæ, [1853] t.p. (D. Gustavus Haenelii)
Wikipedia, 11 July 2016 (Gustav Friedrich Hänel; born 5 October 1792 in Leipzig; died 18 October 1878; German jurist and historian of law)
World biographical information system, 11 July 2016 (Haenel (Hänel), Gustav Friedrich; born 5 October 1792 in Annaberg; grew up in Leipzig)