Lembicz F, El Fray M. Investigations of the ultrasounds velocity and its relation to the heterophase structure of multiblock elastomers consisting of poly(butylene terephthalate) and poly(1,2-oxypropylene) or dimerized fatty acid. p [Internet]. 2022Sep.18 [cited 2024May9];47(9):630-6. Available from: http://ichp.vot.pl/index.php/p/article/view/2010