@unpublished{TUW-218671, author = {Palankovski, Vassil}, title = {{P}hotovoltaic and {T}hermoelectric {D}evices for {R}enewable {E}nergy {H}arnessing}, year = {2012}, note = {invited; talk: {E}lectronica, {S}ofia, {B}ulgaria; 2012-06-14 -- 2012-06-15} }