A. Rolo et al.,  "A comparative study of service quality in Portuguese and Angolan higher education institutions", in Driving quality management and sustainability in VUCA environments: 4th Int. Conf. on Quality Innovation and Sustainability (ICQIS), João Reis, Tiago Pinho, Vítor Barbosa, Luís Barreto, Sandrina B. Moreira, Pedro Pardal, João Nabais, Carlos Mata, Ana Mendes, Ed., Setúbal, Springer, 2024, pp. 199-208