Erić's opus includes different genres. Already in his early works he expresses a tendency towards clarity, formal perspicuity and the synthesis of a "different images", establishing the bases of his own musical expression in the choreographic piece for orchestra "Behind the Sun's Gate" and "Concerto for Orchestra and Soloists". The need to shape his musical expression as his own synthesis of total sound surrounding him, already evident in "Mirage", is developed by in the compositions Erić wrote about two years later: the ballet "Elizabeth the Princess of Montenegro" and the choir "Subito".