 He engaged in extensive work based on critical study of sources and issues of musical style to create a solid basis for Slovenian music history, providing an impetus for similar work elsewhere in Yugoslavia.His critical editions of compositions are of exceptional importance; they were the first of their kind in Slovenia (e.g., "Skladatelji Gallus, Plautzius, Dolar in njihovo delo", 1963; J. Gallus Carniolus, "Harmoniale morales", 1966; J. Gallus Carniolus, "Moralia", 1968).He published numerous articles in Yugoslav and international periodicals.