Occurrence of multiphoton resonances in five-level systems by large-amplitude driving fields Mostafa Karami, Alireza Javdani, Khadijeh Karami and Firoozeh Jamshidi Eur. Phys. J. D, 73 8 (2019) 179 Published online: 21 August 2019 DOI: 10.1140/epjd/e2019-90600-8