@article{91d5b950-7139-454f-b179-c30afe5fbbb4,
author = {Paweł  Rojek},
title = {Konkretny powszechnik},
journal = {Principia},
volume = {2009},
number = {Tom 51-52},
year = {2009},
issn = {0867-5392},
pages = {77-91},keywords = {},
abstract = {},
doi = {},
url = {https://ejournals.eu/czasopismo/principia/artykul/konkretny-powszechnik}
}