Królikowski, K. and Piszczek, K. 2021. Separation of high-density polyethylene/poly(ethylene terephthalate)/poly(vinyl chloride) mixtures based on differences in their hardness. Polimery. 62, 7-8 (Jan. 2021), 599–602. DOI:https://doi.org/10.14314/polimery.2017.599.