TY - JOUR AU - Cocho de Juan, José Ángel PY - 2011 SN - 0003-2670 UR - http://hdl.handle.net/20.500.11940/5756 LA - eng TI - Electrospray ionization tandem mass spectrometry for the simultaneous determination of opiates and cocaine in human hair DO - 10.1016/j.aca.2011.08.013 T2 - ANALYTICA CHIMICA ACTA M2 - 123 VL - 704 ER -