@article {urbaniak2008lesniewski,
	title = {Le{\'s}niewski and Russell{\textquoteright}s paradox: some problems},
	journal = {History and Philosophy of Logic},
	volume = {29},
	number = {2},
	year = {2008},
	pages = {115{\textendash}146},
	author = {Urbaniak, Rafal}
}
