C. Chavarría

Identification of a Complete Sample of Northern ROSAT All-Sky Survey X-Ray Sources. III. The Catalog

W. Voges, J. Krautter, I. Appenzeller, 1998 .

UBVRI-KC Photometry of NGC~2323 and NGC~2539 Open Clusters

W. Schuster, R. Michel, Y. Karatas, 2019, 1906.05600.

CCD $${U\!B\!V\!(R\!I)}_{KC}$$ photometry of NGC 2323 and NGC 2539 open clusters

W. Schuster, R. Michel, Y. Karatas, 2019, Journal of Astrophysics and Astronomy.

Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources - II. The optical observations

Wolfgang Voges, F.-J. Zickgraf, Bodo L. Ziegler, 1997 .

BW Vulpeculae - A coordinated campaign of photoelectric photometry from thirteen observatories

F. A. Catalano, B. Goodrich, J. Africano, 1986 .

Transient supersoft X-ray emission from V 751 Cygni during the optical low-state

J. Greiner, G. Tovmassian, R. Gonz'alez-Riestra, 1998, astro-ph/9812054.

UV spectrograms of T Tauri stars

R. Mundt, J. Krautter, I. Appenzeller, 1980 .