Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance. - Abdalla, H; Adam, R; Aharonian, F; Ait Benkhali, F; Angüner, E O; Arakawa, M; Arcaro, C; Armand, C; Armstrong, T; Ashkar, H; Backes, M; Baghmanyan, V; et al. (Monthly Notices of the Royal Astronomical Society, 2020)