Entry Barriers in Seaports Entry Barriers in Seaports Adapted from: De Langen P.W. and Pallis Α.Α. (2007). Entry Barriers in Seaports, Maritime Policy and Management, 34(5), 427-440. Share this:Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)