Lepton flavor violation and collider searches in a type I + II seesaw model Manoel M. Ferreira, Tessio B. de Melo, Sergey Kovalenko, Paulo R. D. Pinheiro and Farinaldo S. Queiroz Eur. Phys. J. C, 79 11 (2019) 955 Published online: 21 November 2019 DOI: 10.1140/epjc/s10052-019-7422-z