articles on Hydrotherapy

Dear Physiotherapists,
I intrested in Hydrotherapy and I will do a PhD on this area. Im interested in finding articles on hydrotherapy and of course if I can get them for free the better it will be. informs about sites which i can visit is welcome

i know the sites that help you:
www.orthosportpt.net
www.sciwalk.com
www.artheritis.com

Dear physiotherapists,

i would like links on hydrotherapy. i will be implementing it on cerebral palsy children, so if there is any links please do post them here.

Thanks.