Left: relation between M(Hi) and L_B (in solar units) for 103 Lynx-Cancer void galaxies with Hi data. Dotted line shows positions for objects with M(Hi)/L_B = 1. Dashed line shows the linear regression on all galaxies, with the slope of k1 = 0.875 ± 0.055 and rms = 0.45 (in log M(Hi)). Right: same relation for all 82 galaxies from comparison sample in the Local Volume groups. The slope of the linear regression is k2 = 0.792 ± 0.051 and rms = 0.44 (in log M(Hi)). See “Discussion” for further implications.