Dupont, NicolasHess, Kathryn2008-11-142008-11-142008-11-14199910.1007/s002080050302https://infoscience.epfl.ch/handle/20.500.14299/30916WOS:000081619500002algebraic modelsfiber squaresNoncommutative algebraic models for fiber squarestext::journal::journal article::research article