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Proceedings of ECOpole > 2020 > Vol. 14, No. 1 > 59--67
Archives of Environmental Protection > 2019 > Vol. 45, no. 4 > 40--47
Proceedings of ECOpole > 2015 > Vol. 9, No. 1 > 155--162
Proceedings of ECOpole > 2020 > Vol. 14, No. 1 > 59--67
Archives of Environmental Protection > 2019 > Vol. 45, no. 4 > 40--47
Proceedings of ECOpole > 2015 > Vol. 9, No. 1 > 155--162