Dow, Norris F. & Hickman, William A. Effect of variation in diameter and pitch of rivets on compressive strength of panels with Z-section stiffeners: 1: panels with close stiffener spacing that fail by local buckling, report, August 1945; (https://digital.library.unt.edu/ark:/67531/metadc60974/m1/1/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .