Tunneling of massive dirac fermions in graphene through time-periodic potential Ahmed Jellal, Miloud Mekkaoui, El Bouâzzaoui Choubabi and Hocine Bahlouli Eur. Phys. J. B, 87 6 (2014) 123 Published online: 02 June 2014 DOI: 10.1140/epjb/e2014-41096-3