TY - CONF T1 - Proof of a conjecture of A. Pitts JO - JOURNAL OF PURE AND APPLIED ALGEBRA PY - 1999/11/10 AU - Moerdijk I AU - Vermeulen JJC ED - VL - 143 IS - 1-3 SP - 329 EP - 338 Y2 - 2024/12/22 ER -