1.
Reassignment of Six Polyalthia Species to the New Genus Maasia (Annonaceae): Molecular and Morphological Congruence
by Mols, Johan B
Systematic botany, 2008, Vol.33 (3), p.490-494

2.
Reassessing the Generic Status of Petalolophus (Annonaceae): Evidence for the Evolution of a Distinct Sapromyophilous Lineage within Pseuduvaria
by Su, Yvonne C. F
Systematic botany, 2005, Vol.30 (3), p.494-502
