Abstract
For the original article see ibid., vol.38, no.10, p.1510-14 (1990). The commenter corrects what he believes to be mistakes in the above-named work by S.B. Worm. The author's reply is included.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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