Calabi-Yau coverings over some singular varieties and new Calabi-Yau   3-folds with Picard number one
  This note is a report on the observation that some singular varieties admit Calabi--Yau coverings. As an application, we construct 18 new Calabi--Yau 3-folds with Picard number one that have some interesting properties. 
Nam-Hoon Lee