Benzo b furan and derivatives, recent advances

Cagniant, P., Cagniant, D., Recent Advances in the Chemistry of Benzo[b]furan and Its Derivatives. Part I. Occurrence and Synthesis, 18, 337. 

Recent advances in the chemistry of benzo[b]furan and its derivatives. Part I Occurence and synthesis , Cagniant, P. and Cagniant, D., Adv. Heterocycl. Chem., 1975, 18, 337. 

---