Composition dependence in surface properties of poly(lactic acid)/graphene/carbon nanotube composites - Ivanova, Radost-a; Kotsilkova, Rumiana-a; Ivanov, Evgeni-a,b; Donato, Ricardo K.-c; Fechine, Guilhermino J.M.-d; Andrade, Ricardo J.E.-d; di Maio, Rosa-e; Silvestre, Clara-e. (2020)