Karla Hartl is founder and chair of the Kapralova Society, a Canadian music society founded in 1998 in Toronto to promote Czech composer Vitezslava Kapralova and other women in music. Hartl's research has been published in Tempo (Cambridge University Press), Journal of the IAWM (International Alliance for Women in Music), Czech Music Quarterly (Czech Music Fund), Journal of Czech and Slovak Music (Dvorak Society of Great Britain), VivaVoce (Frau und Musik), Opus musicum, Harmonie, and Kapralova Society Journal. Hartl is co-editor of the first English-language monograph on Kapralova, The Kapralova Companion, published by Lexington Books (Rowman & Littlefield) in the United States in 2011 and shortlisted for the 2011 F.X. Salda Foundation Award. She collaborated on a five-hour radio documentary on Kapralova produced by the BBC Radio 3 for the composer's centenary in 2015, wrote an introductory chapter in another collective monograph on the composer, Vitezslava Kapralova (1915–1940): Zeitbilder, Lebensbilder, Klangbilder, published by Chronos Verlag in Zurich in 2017, and edited a multi-volume collection of Kapralova's correspondence, published by the Kapralova Society from 2015 to 2020. Hartl is the author of Vitezslava Kapralova: Tematicky katalog skladeb a korespondence s nakladateli, published by the Czech Radio Publishing House in 2020 (the catalog's English version will be available in 2026), and of Kauza Kaprálová, published by Nakladatelstvi Klic in 2021. She is also the co-editor of the Women in Music Anthology, published in 2021 by the Kapralova Society. In recent years, Hartl collaborated on two television documentaries on the composer and wrote a script for a radio series produced by the Czech Radio for Kapralova’s 110th anniversary. In 2026, Nakladatelstvi Klic published her bilingual biography of the composer.