▁he ▁don ated ▁to ▁friends , ▁colle agues ▁and ▁planet ari ums . ▁He ▁was ▁the ▁first ▁author ▁in ▁his ▁country ▁to ▁promote ▁this ▁style ▁with ▁art ▁exhib itions ▁and ▁events . ▁ ▁Biography ▁ ▁Born ▁in ▁the ▁village ▁of ▁Drag ije vo ▁near ▁Vel iko ▁T arn ovo , ▁Bulg aria ▁in ▁the ▁year ▁of ▁ 1 9 4 5 . ▁After ▁gradu ating ▁the ▁St . ▁Clement ▁of ▁O hr id ▁University ▁of ▁Sof ia ▁with ▁a ▁degree ▁in ▁physics ▁he ▁started ▁working ▁in ▁the ▁Techn ical ▁University ▁of ▁V arna ▁as ▁an ▁assistant ▁professor ▁in ▁the ▁mathematical ▁department . ▁ ▁Being ▁drawn ▁towards ▁fut ur istic ▁and ▁fant asy ▁art ▁since ▁he ▁was ▁a ▁child , ▁Stefan ▁Le fter ov ▁started ▁mixing ▁various ▁painting ▁techniques ▁so ▁that ▁he ▁can ▁try ▁to ▁express ▁his ▁inner ▁vision ▁of ▁fut ur istic ▁land sc apes ▁and ▁technology . ▁Some ▁of ▁his ▁methods ▁and ▁work ▁were ▁heavily ▁critic ized ▁by ▁his ▁fellow ▁art ▁colle agues ▁in ▁the ▁city ▁of ▁V arna ▁for ▁being ▁based ▁on ▁academic ism . ▁ ▁This ▁forced ▁him ▁to ▁study ▁world ▁art ▁and ▁to ▁perfect ▁his ▁style . ▁In ▁the ▁year ▁of ▁ 1 9 6 5 ▁his ▁paint ings ▁were ▁shown ▁in ▁the ▁Russian ▁magazine ▁" Te chn ica ▁Mal ode ji " ▁(" Т е х ника ▁моло де жи ") ▁and ▁the ▁Bulgar ian ▁" NT ▁za ▁m lade j ta " ▁(" Н Т ▁за ▁м ла де ж т a "). ▁In ▁the ▁same ▁year