http://www.sec.gov/Archives/edgar/data/70502/000007050216000733/pps426.htm
http://www.sec.gov/Archives/edgar/data/70502/000007050216000734/fps425.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036116073172/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036116073253/form424b2.htm
http://www.sec.gov/Archives/edgar/data/78460/000119312516655990/d121446d424b5.htm
http://www.sec.gov/Archives/edgar/data/1393612/000119312516656383/d219980d424b2.htm
http://www.sec.gov/Archives/edgar/data/1022321/000119312516656657/d205311d424b5.htm
http://www.sec.gov/Archives/edgar/data/1071993/000119312516656675/d212256d424b5.htm