Sara Ashley O’Brien «Thousands Are Bypassing the Post Office with This App», CNNMoney, May 5, 2015: money.cnn.com/2015/04/21/technology/shyp-series-b/

Seth Fiegerman «Google Becomes a Rival to Amazon to Deliver Your Fresh Fruits and Veggies», Mashable, September 8, 2015: mashable.com/2015/09/08/google-express-fresh-groceries/#uLCdTIHoSqN1⁵ Adrian Gonzalez «Amazon’s 3D Printing Patent: The Quixotic Quest for Instant Delivery?», LinkedIn Pulse (blog), March 5, 2015: linkedin.com/pulse/amazons-3d-printing-patent-quixotic-quest-instant-adrian-gonzalez