Zgoda, M. M., W. Hreczuch, M. Woskowicz, M. Nachajski, and M. Kołodziejczyk. “Surfactants from the Group of Fatty Acids Polyoxyethylenated Esters. Part I. Hydrophylic-Lipophilic Equilibrium (HLB), Solubility Parameter and a Type of Surface Activity of the Rape Oil Fatty Acids Methyl Esters Oxyethylenation Products”. Polimery, vol. 48, no. 5, Sept. 2022, pp. 365-70, https://ichp.vot.pl/index.php/p/article/view/1873.