%0 Journal Article %T On the Almost Periodic Solutions of Differential Equations on Hilbert Spaces %A Nguyen Thanh Lan %J International Journal of Differential Equations %D 2009 %I Hindawi Publishing Corporation %R 10.1155/2009/575939 %X For the differential equation ­å()=() %U http://www.hindawi.com/journals/ijde/2009/575939/