[ 1 ]

[ 2 ]       NoSQL Distilled: A Brief Guide to the Emerging World of Polyglot Persistence by Pramod J. Sadalage, Martin Fowler

[ 3 ]       Seven Databases in Seven Weeks: A Guide to Modern Databases and the NoSQL Movement, by: Eric Redmond and Jim R. Wilson

[ 4 ]       Thanks to  J. Ullmann, P. Valduriez, Cl. Roncancio, Ch. Bobineau, JL. Zechinelli, R. Lozano for the slides provided