Slobodan Kovačević was the most prolific author in the Indexi, signing many of their most significant songs or composer, arranger and producer who dragged the group toward constant innovation and experimentation .
Bodo Kovačević je bio najplodniji autor u Indexima, potpisujući mnoge od njihovih najznačajnijih pjesama, odnosno kompozitor, aranžer i producent koji je grupu vukao prema stalnim eksperimentima.