@article {ChGiIo09,
	title = {Policy Gradient Learning for a Humanoid Soccer Robot},
	journal = {Robotics and Autonomous System - Special Issue on {\textquoteleft}{\textquoteleft}Humanoid Soccer Robots{\textquoteright}{\textquoteright}},
	volume = {57},
	number = {8},
	year = {2009},
	pages = {808{\textendash}818},
	issn = {0921-8890},
	author = {A. Cherubini and F. Giannone and L. Iocchi and M. Lombardo and G. Oriolo}
}
@article { ChGiIo09,
	title = {Policy Gradient Learning for a Humanoid Soccer Robot},
	journal = {Robotics and Autonomous System - Special Issue on {\textquoteleft}{\textquoteleft}Humanoid Soccer Robots{\textquoteright}{\textquoteright}},
	volume = {57},
	number = {8},
	year = {2009},
	pages = {808{\textendash}818},
	issn = {0921-8890},
	author = {A. Cherubini and F. Giannone and L. Iocchi and M. Lombardo and G. Oriolo}
}
