His political activism for a Croatian national revival dealt through his participation in many patriotic pamphlets, most notably the Narodne novine and Hrvatski Sokol among many others.

He also wrote short stories, feuilletons, literary critics, librettos for Vatroslav Lisinski opera's Ljubav i zloba and Porin and for his dramas Dramatička pokušenja I.

In his texts he tried to join the tradition of the old Croatian literature with tendentions[check spelling] in European drama.

He was also editor or various almanacs of patriotic orientation: Iskra, Südslavische Zeitung, Danica ilirska, Narodne novine and Hrvatski Sokol.

Instead of narrative epic tendency he gives to his poems a strong dramatic characteristics which reminds us Byron's literary work.

Demeter died in Zagreb on 24 June 1872 and since he was a Greek-Orthodox he was originally buried at the Eastern Orthodox cemetery in Pantovčak neighborhood.