Singh, Satpal. 2012. “Probable First Sighting of Dark Morph of Eastern Cattle-EGRET <I>Bubulcus coromandus< i> From Lakhimpur Kheri, Uttar Pradesh, India”. Journal of the Bombay Natural History Society (JBNHS) 109 (3):199-99. http://bnhsjournal.in/index.php/bnhs/article/view/156557.