Artificial neural networks for aerobic fitness approximation. - Kauko Väinämö; Seppo Nissilä; Timo Mäkikallio; Mikko Tulppo; Juha Röning (ICNN, 1996)

A real-time microprocessor QRS detector system with a 1-ms timing accuracy for the measurement of ambulatory HRV. - Antti Ruha; Sami Sallinen; Seppo Nissilä (IEEE Trans. Biomed. Eng., 1997)