http://www.sec.gov/Archives/edgar/data/1666268/000095010317009737/dp81347_424b2-ps1901.htm
http://www.sec.gov/Archives/edgar/data/1618563/000104746917006230/a2233464z424b5.htm
http://www.sec.gov/Archives/edgar/data/1020569/000104746917006234/a2232915z424b5.htm
http://www.sec.gov/Archives/edgar/data/1061198/000110465917061095/a17-22614_9424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036117037683/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036117037726/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1043219/000119312517304631/d450726d424b5.htm
http://www.sec.gov/Archives/edgar/data/1145765/000161577417005557/s107687.htm