Gabriel Wachman Roni Khardon Pavlos Protopapas Charles R. Alcock Kernels for Periodic Time Series Arising in Astronomy. 489-505 2009 ECML/PKDD (2) http://dx.doi.org/10.1007/978-3-642-04174-7_32 conf/pkdd/2009-2 db/conf/pkdd/pkdd2009-2.html#WachmanKPA09