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Berman, J., Dziobiak, W., Pigozzi, D. et al. In Memory of Willem Johannes Blok 1947-2003. Stud Logica 83, 5–14 (2006). https://doi.org/10.1007/s11225-006-8295-3
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DOI: https://doi.org/10.1007/s11225-006-8295-3