1. Märkl G (1966) Angew Chem Int Ed Engl 5:846
2. Märkl G (1990) Multiple bonds and low coordination in phosphorus chemistry,. Georg Thieme Verlag, New York, p 220
3. Le Floch P (2001) Phosphorus-carbon heterocyclic chemistry : Tthe rise of a new domain., Pergamon, p 485
4. Dillon KB, Mathey F, Nixon JF (1998) Phosphorus: Tthe carbon copy. Wiley, Chichester
5. Mathey F, Le Floch P (2004) Science of synthesis,vol.15, Thieme Verlag,p. :1097