E. Al Ibrahmi, F. Hamdaoui, A. Achhar, A. Elbourkad, S. Chakiri, Z. Bejjaji
      Activities of uranium and radium radioisotopes in sediment samples and their impact on soil pollution in Lower Moulouya River (Morocco)
      Environmental Sciences, Vol. 5, 2017, no. 1, 1-8
      doi: 10.12988/es.2017.731