edited by J. Szabados and K. Tandori
North-Holland , János Bolyai Mathematical Society , Elsevier Science Publishing Company Inc.
1987
Colloquia Mathematica Societatis János Bolyai
49
: set : North-Holland , : set : Bolyai , v. 1 : North-Holland , v. 1 : Bolyai , v. 2 : North-Holland , v. 2 : Bolyai
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