array(5) { [0]=> string(72) "Ajay D Kshemkalyani_ Mukesh Singhal - Distributed computing _ principles" [1]=> string(11) " algorithms" [2]=> string(50) " and systems-Cambridge University Press (2008).pdf" [3]=> string(8) " 2602891" [4]=> string(21) " 2020-03-05 06:04:2 " } array(6) { [0]=> string(19) "ANDREW S. TANENBAUM" [1]=> string(40) " MAARTEN VAN STEEN - Distributed Systems" [2]=> string(25) " Principles And Paradigms" [3]=> string(39) " (Problem Solutions)-Prentice Hall .pdf" [4]=> string(7) " 208236" [5]=> string(21) " 2020-03-05 06:04:2 " } array(4) { [0]=> string(82) "Brendan Burns - Designing Distributed Systems_ Patterns and Paradigms for Scalable" [1]=> string(46) " Reliable Services-O’Reilly Media (2018).pdf" [2]=> string(8) " 6922568" [3]=> string(21) " 2020-03-05 05:57:2 " }