João Mendes-Moreira Carlos Soares Alípio Mário Jorge Jorge Freire de Sousa The Effect of Varying Parameters and Focusing on Bus Travel Time Prediction. 689-696 2009 PAKDD http://dx.doi.org/10.1007/978-3-642-01307-2_69 conf/pakdd/2009 db/conf/pakdd/pakdd2009.html#MoreiraSJS09