A clip-free eyeglasses-based wearable monitoring device for measuring photoplethysmograhic signals. - Yali Zheng; Billy Leung; Stanley Sy; Yuan-Ting Zhang; Carmen C. Y. Poon (EMBC, 2012)

Optimizing Financial Markets in C# .NET. - Billy Leung; Zenon Chaczko; Jan Nikodem (Computational Intelligence and Efficiency in Engineering Systems, 2015)