Boonmalai, A., 		Jakmunee, J., & 		Kritsunankul, O.
(2016).
 Simultaneous Determination of Methanol and Ethanol Residues in Biodiesel by  a Simple Headspace Single-Drop Microextraction and Gas Chromatography  with Flame Ionization Detection.
<em>Naresuan University Journal: Science And Technology (NUJST), 23</em>(3), 109-119.
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