@conference { ChGi07b,
	title = {An extended policy gradient algorithm for robot task learning},
	year = {2007},
	pages = {4121{\textendash}4126},
	isbn = {978-1-4244-0912-9},
	author = {A. Cherubini and F. Giannone and L. Iocchi and P. F. Palamara}
}
