Boron trifluoride etherate as a calalyst in acyclation of ferrocene - Darin, Vitor André; Federman Neto, A.; Miller, Joseph; Afonso, Márcia Maísa de Freitas; Fonsatti, Helen Cristina; Borges, Aurea Donizete Lanchote (Journal Fuer Praktsiche Chemie, 1999)