Boonmalai, A., 		Jakmunee, J., & 		Kritsunankul, O.
2016 Jan  6.  Simultaneous Determination of Methanol and Ethanol Residues in Biodiesel by  a Simple Headspace Single-Drop Microextraction and Gas Chromatography  with Flame Ionization Detection. Naresuan University Journal: Science and Technology (NUJST). [Online] 23:3