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Partially supported by NSF Grant DMS-9004123 and ARO through MSI Cornell (DAAG 29-85-C-0018)
Partially supported by NSF Grant DMS-8908267
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Billera, L.J., Rose, L.L. Modules of piecewise polynomials and their freeness. Math Z 209, 485–497 (1992). https://doi.org/10.1007/BF02570848
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DOI: https://doi.org/10.1007/BF02570848