Ferromagnetism and ferroelectricity in EuX (X = O, S): pressure effectsMostefa Djermouni, Ali Zaoui, Salima Kacimi, Nawel Benayad and Abdelkader BoukorttEur. Phys. J. B, 91 2 (2018) 28DOI: https://doi.org/10.1140/epjb/e2017-80604-7