Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, , vol. 25, p. 473 - 477

Major, A.; Nagy, Z.; Nogradi, M.
Acta Chimica Academiae Scientiarum Hungaricae, 1980 , vol. 104, p. 85 - 88

Saxena, Shabnam; Makrandi, J. K.; Grover, S. K.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1986 , vol. 25, p. 473 - 477