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Andrzej Ehrenfeucht Jeff Kahn Roger D. Maddux Jan Mycielski Addendum to the paper "On the dependence of functions on their variables". 317 1986 42 J. Comb. Theory, Ser. A 2 http://dx.doi.org/10.1016/0097-3165(86)90105-6 db/journals/jct/jcta42.html#EhrenfeuchtKMM86