New ex-OH maser detections in the northern celestial hemisphere O. Patoka, O. Antyufeyev, I. Shmeld, V. Bezrukovs, M. Bleiders, A. Orbidans, A. Aberfelds and V. Shulga A&A, 652 (2021) A17 Published online: 03 August 2021 DOI: 10.1051/0004-6361/202037623