(2007)“Genetic differentiation between Príncipe Island and mainland populations of the grey parrot (Psittacus erithacus), and implications for conservation”, Molecular Ecology16(8), p. 1673–1685. doi:10.1111/j.1365-294X.2006.03128.x. Bibkodo:2007MolEc..16.1673M.
(2007)“Genetic differentiation between Príncipe Island and mainland populations of the grey parrot (Psittacus erithacus), and implications for conservation”, Molecular Ecology16(8), p. 1673–1685. doi:10.1111/j.1365-294X.2006.03128.x. Bibkodo:2007MolEc..16.1673M.