array(5) { [0]=> string(76) "Kalman Filtering - Theory and Practice Using MATLAB - Mohinder Grewal (Wiley" [1]=> string(5) " 2001" [2]=> string(16) " 0471392545).pdf" [3]=> string(8) " 3055616" [4]=> string(21) " 2007-10-12 20:13:4 " }