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♦ ¹THE IMPORTANCE OF BIRDS AS BROWSERS, POLLINATORS AND SEED DISPERSERS IN NEW ZEALAND FORESTS, M.N. Clout and J. R. Hay, NEW ZEALAND JOURNAL OF ECOLOGY, VOL 12, (SUPPLEMENT) 1989, pp. 27-33
♦ ²New Zealand Institute for Plant & Food Research Plant-SyNZ™ database
♦ ³A STUDY OF AVIAN FRUGIVORES, BIRD-DISPERSED PLANTS, AND THElR INTERACTION IN MEDITERRANEAN SCRUBLANDS, CARLOS M. HERRERA, Ecological Monographs, 54(1), 1984, pp. 1-23
♦ ⁴FLESHY FRUITS OF INDIGENOUS AND ADVENTIVE PLANTS IN THE DIET OF BIRDS IN FOREST REMNANTS, NELSON, NEW ZEALAND, PETER A. WILLIAMS and BRIAN J. KARL, New Zealand Journal of Ecology (1996) 20(2): 127-145
♦ ⁵Geographical ecology and variation of plant-seed disperser interactions: southern Spanish junipers and frugivorous thrushes, Pedro Jordano, Vegetatio 107/108: 85-104, 1993.