Binding weakly interacting partners: a study of Ca–He2 and its isotopomersD. López-Durán, R. Rodríguez-Cantano, T. González-Lezana, G. Delgado-Barrio, P. Villarreal and F.A. GianturcoEur. Phys. J. D, 66 7 (2012) 198DOI: https://doi.org/10.1140/epjd/e2012-30202-6