Show all abstractsHide all abstracts

C. R. Math. Rep. Acad. Sci. Canada Vol. 2 (4) 1980, pp. 159–164
J. Aczél (Received: 1980/05/08) C. R. Math. Rep. Acad. Sci. Canada Vol. 2 (4) 1980, pp. 155–158
C.T. Ng (Received: 1980/05/08)