Kinematical analysis of five BCDs with a regularly rotating H I  disk. Left: PV-diagrams obtained along the disk major axis from the observed cube and the model-cube. Contours are at −1.5 (dashed), 1.5, 3, 6, 12σ. The squares show the rotation curve used to build the models, projected along the line of sight. Right: observed rotation curve (filled circles) and asymmetric-drift-corrected rotation curve (open circles). See Sect. 5 for details.