http://www.sec.gov/Archives/edgar/data/834071/000095010315006808/dp59151_424b5.htm
http://www.sec.gov/Archives/edgar/data/1540947/000104746915007011/a2225824z424b5.htm
http://www.sec.gov/Archives/edgar/data/19617/000119312515304414/d71729d424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000121465915006336/b827150424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000121465915006344/b827152424b2.htm
http://www.sec.gov/Archives/edgar/data/1648858/000153949715001350/n519_pros-x18.htm