Flügel, Peter, "Johannes Emil Otto Klatt (1852–1903). Forgotten Chronicler of Jainism and Bibliographer of Oriental Literature: Letters to Albrecht Weber 1874–1882, Ernst Kuhn 1881–1889, Charles Rockwell Lanman 1889 and Ehrhardt Karras 1891, with Curricula Vitae, and a Complete Bibliography of Johannes Klatt’s Works", Berliner Indologische Studien, 2017