Fiteni, Karl, Caruana, Joseph, Amarante, Joao A.S., Debattista, Victor P ORCID: 0000-0001-7902-0116 and Beraldo E silva, Leandro ORCID: 0000-0002-0740-1507 (2021) The relative efficiencies of bars and clumps in driving disc stars to retrograde motion. Monthly Notices of the Royal Astronomical Society, 503 (1). pp. 1418-1430. ISSN 0035-8711