TY  - JOUR 
AU  - Cocho de Juan, José Ángel
PY  - 2013
SN  - 0003-2670
UR  - http://hdl.handle.net/20.500.11940/3683
LA  - eng
TI  - Direct tandem mass spectrometry for the simultaneous assay of opioids, cocaine and metabolites in dried urine spots
DO  - 10.1016/j.aca.2013.04.061
T2  - ANALYTICA CHIMICA ACTA
M2  - 25
VL  - 784
ER  -