Janet Rothwell Zuhair Bandar James O'Shea David McLean Charting the behavioural state of a person using a backpropagation neural network. 327-339 2007 16 Neural Computing and Applications 4-5 http://dx.doi.org/10.1007/s00521-006-0055-9 db/journals/nca/nca16.html#RothwellBOM07