TY - GEN T1 - K3--Fibrations and Heterotic-Type II String Duality UR - https://doi.org/10.1016/0370-2693(95)00937-G PY - 1995/06/18 AU - Klemm A AU - Lerche W AU - Mayr P ED - Y2 - 2026/09/12 ER -