维基文库中的相关原始文献:New York Times v. Sullivan 纽约时报诉沙利文案(New York Times Co. v. Sullivan, 376(英语:List of United States Supreme Court cases, volume 376) U.S. 254
Ashcroft v. Free Speech Coalition, 535(英语:List of United States Supreme Court cases, volume 535) U.S. 234, 256 (2002). 维基文库中的相關文獻:Ashcroft v. Free Speech
Conference v. Noerr Motor Freight, Inc)”和1965年的“美國礦工工會訴邊寧頓案(英语:UnitedMineWorkersv. Pennington)” William Cooney. Competition and the Noerr-Pennington doctrine: