Khudobin,Yu.I. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1976 , vol. 25, p. 1538 - 1540
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1976 , vol. 25, p. 1622 - 1625

Maciejewski; Marciniec; Kownacki
Journal of Organometallic Chemistry, 2000 , vol. 597, # 1-2 p. 175 - 181