Ultraviolet-visible and high-resolution mass spectrometry for the identification of cyclopropyl-fentanyl in the first fatal case in Spain

1. Matey, J.M.
2. García-Ruíz, C.
3. Montalvo, G.
4. Gómez-Soro, J.C.
5. Gutierrez-Delicado, D.
6. Rodríguez-Gallardo, J.
7. Martínez, M.A.