H. Petit

Catalogue of HII regions in NGC 7331 at the 6 meter telescope

H. Petit, 1998 .

H-alpha survey of M 33 with the six-meter telescope : morphology of the general diffuse emission, evidence for a chaotic medium of bubbles and filaments.

G. Courtes, J. Sivan, M. Petit, 1987 .

Structure of the spiral arms of NGC 4258 in Hα and a 2000 Å

G. Courtes, M. Golay, A. Blecha, 1993 .