Babiarz, S. 2018. Gloss to the decisions of the Supreme Administrative Court of 6 June 2018, ref. No. II FSK 1525/16 and II FSK 1526/16. Tax Law Quarterly. 1 (Mar. 2018), 9–24. DOI:https://doi.org/10.18778/1509-877X.2018.01.01.