TY - JOUR T1 - Left fibrations and homotopy colimits JO - Mathematische Zeitschrift PY - 2013/08/03 AU - Heuts G AU - Moerdijk I ED - DO - DOI: 10.1007/s00209-014-1390-7 PB - Springer Science and Business Media LLC VL - 279 IS - 3-4 SP - 723 EP - 744 Y2 - 2024/12/22 ER -