Cyclic phenomena in the circumstellar gaseous envelope of the candidate Herbig A0e star HD 163296N. G. Beskrovnaya, M. A. Pogodin, R. V. Yudin, G. A.P. Franco, S. L.A. Vieira and A. EvansAstron. Astrophys. Suppl. Ser., 127 2 (1998) 243-249DOI: https://doi.org/10.1051/aas:1998346