EAdded a reference to [IUTchI], Remark 3.1.2, (ii), (iii), in Remark 2.3.3, (vi)

ESlightly modified the references to Theorem 3.11 in Remark 2.3.3, (vi) (2 instances)

EAdded a reference to Remark 2.3.3, (vi), in Theorem 3.11, (ii)