Another paper on imperative consequence, this time critiquing Jörgensen’s (1937) “transformational” strategy - the idea that an argument containing imperatives can be translated into an argument not containing imperatives and which is valid iff the original argument was.
Jörgensen, Jörgen. 1937. “Imperatives and Logic.” Erkenntnis 7 (January): 288–96. http://www.jstor.org/stable/20011886.