“Surface Modification of poly(tetrafluorethylene) Magnetic Stirring Bars With Plasma of Hexamethyldisiloxane and Its Applications in the Stir Bar Sorptive Extraction Technique”. Superficies Y Vacío, vol. 25, no. 1, Mar. 2012, pp. 49-55, https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/228.