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To the memory of Professor Andrzej Mostowski
Allatum est die 2 Februarii 1976
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Murawski, R. On expandability of models of Peano arithmetic. I. Stud Logica 35, 409–419 (1976). https://doi.org/10.1007/BF02123406
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DOI: https://doi.org/10.1007/BF02123406