Hubert Schmidbaur, Graham A. Bowmaker, Ulrich Deschler, Cornelia Dörzbach, Rudolf Herr, Beatrix Milewski-mahrla, Annette Schier, Christian E. Zybill,
Ylide Chemistry: An Account of Structural, Conformational and Redox Investigations Phosphorus Sulfur and Silicon and The Related Elements. ,vol. 18, pp. 167- 170 ,(1983) ,
10.1080/03086648308075993