Riina Lepik : doctor philosophiae keskkonnatehnoloogia alal. PhD in Environmental Technology. Fenoolsete ühendite biodegradeeritavus üksik- ja segasubstraatidena aktiivmuda toimel = Biodegradability of phenolic compounds as single and mixed substrates by activated sludgeLepik, RiinaTartu Ülikooli doktorite promoveerimine = Doctoral degrees awarded at the University of Tartu : 20112011 / lk. 140-142