50 Dra: Am-type twins with additional variability in a non-eclipsing system M. Skarka, J. Lipták, E. Niemczura, Z. Mikulášek, M. Cabezas, M. Vítková, R. Karjalainen and P. Kabáth A&A, 698 (2025) A48 Published online: 28 May 2025 DOI: 10.1051/0004-6361/202452341