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Partially supported by grant DGCIyT PB91-0334
Partially supported by grant ERB-CIPA-CT-92-2053, No. 5246 of the European Economic Community.
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Burmeister, P., Rosselló, F. & Rudak, L. On Höft's characterization of weak model classes. Algebra Universalis 34, 214–219 (1995). https://doi.org/10.1007/BF01204783
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DOI: https://doi.org/10.1007/BF01204783