M. M. Mendes and O. M. Magano,  "Searching with Roma people: ethical and methodological challenges and dilemmas in the use of conventional versus participatory methodologies ”", in Seminário internacional Ciganos em Portugal, Espanha e Brasil: analisando contextos, demandas e processos identitários (Int. Roma seminar in Portugal, Spain and Brazil: analyzing contexts, demands and identity processes), Lisbon, 2019