Key points are not available for this paper at this time.
looked like one of the strongest candidates for a counterexample to the 4-dimensional Poincaré Conjecture. In this paper we show that Mazurs example is in fact a true 4-sphere after all. This raises the odds in favour of the 4-dimensional Poincaré Conjecture.
E. C. Zeeman (Fri,) studied this question.