His image is that of an loner, living on the fringe of society, struggling for survival at start. His work is deeply tied to the small town atmosphere of Košice and its people, whose macrocosm can be seen in most of his works. In formal terms his work reflects secessionist expressionism and symbolism of Konštantín Kövári-Kačmárik and the Hungarian symbolism of Károly Férenczy and József Rippl-Rónai.
The works of Július Jakoby are exhibited in Slovak national gallery, National Gallery in Prague and Hungarian National Gallery and in many Slovak art museums and private collections. The biggest collection of his work is held in East Slovak Gallery in Košice.
- "A (cseh)szlovákiai magyarok lexikona 1918-tól (Cyclopaedia of Hungarians of Czechoslovakia from 1918)". Forum Institute (Databank of Hungarians in Slovakia). Archived from the original on 18 April 2013. Retrieved 8 November 2012.
- Jakoby Gyula. Kortárs Magyar Művészeti Lexikon (Encyclopedia of Contemporary Hungarian Arts) , 2. kötet. Főszerk. Fitz Péter, Enciklopédia Kiadó, Budapest, 2000., 201–203.
- 111 Diel Zo Zbierok (1. vyd ed.). Bratislava: Slovenská národná galéria. 2008. ISBN 978-80-8085-601-4.