Solid-phase micro-extraction-gas chromatography-mass spectrometry and headspace-gas chromatography of tetrahydrocannabinol, amphetamine, methamphetamine, cocaine and ethanol in saliva samples - Yonamine, Maurício; Tawil, Nádia; Moreau, Regina Lúcia de Moraes; Silva, Ovandir Alves (Journal of Chromatography B - Analytical Technologies in the Biomedical and Life Sciences, 2003)