Ukielski, R. “The Effect of Polyamide and Polyether Block Length on the Structure and Properties of poly[(tetramethylene Terephthalate)-Block-(oxytetramethylene)-Block-(e-caprolaktam)] Elastomer”. Polimery, vol. 47, no. 6, Sept. 2022, pp. 404-13, https://polimery.ichp.vot.pl/index.php/p/article/view/1983.