Electronic transport properties of YBa_1tn2Cu_1tn3O_1tn7_1tn-_1tnx, PrBa_1tn2Cu_1tn2_1tn._1tn9Ga_1tn0_1tn._1tn1O_1tn7_1tn-_1tny trilayers and superlattices perpendicular to the layer structure [Elektronische Ressource] / vorgelegt von Hernán Rodríguez