Searches for Heavy Lepton Partners of Neutrinos in Proton-Proton Collisions at CMS Experiment in the Context of Seesaw MechanismS. Vanini, A. Gozzelino, P. Checchia and E. TorassaEPJ Web of Conferences, 60 (2013) 20033DOI: https://doi.org/10.1051/epjconf/20136020033