Reference

L. Anders Nilsson, Elisabeth Rabakonandrianina, Börge Pettersson, Jaona Ranaivo (1990): "Ixoroid" secondary pollen presentation and pollination by small moths in the Malagasy treelet Ixora platythyrsa (Rubiaceae) – Österreichische Botanische Zeitschrift = Plant Systematics and Evolution – 170: 161 - 175.