According to Grove Music Online, "Malheur me bat" is "attrib. Ockeghem in 1501¹, taken over by scribe of CH-SGs 461 and Aaron, but attrib. Martini in I-Fc 2439, Fn B.R.229 and Rvat C.G.XIII.27; attrib. Malcort in Rc 2856 (anon. in 5 other sources); attribs. in Florentine MSS appear most reliable".