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@article{Authenticus:P-00M-MA3,
	title = {{Commutative positive varieties of languages}},
	author = {J Almeida and Z Ésik and JE Pin},
	doi = {10.14232/actacyb.23.1.2017.7},
	journal = {CoRR},
	number = {1},
	pages = {91-111},
	publisher = {University of Szeged},
	type = {Article in Press},
	volume = {abs/1703.02154},
	year = {2017}
}