Key points are not available for this paper at this time.
Original article can be found at: http://www.informaworld.com/smpp/title~content=t713722751 Copyright Informa / Taylor and Francis Group. DOI: 10.1080/019697201300001803 Full text of this article is not available in the UHRA
Chrystopher L. Nehaniv (Mon,) studied this question.