1. Zeitschr. für Wahrscheinlichkeitstheorie und verw. Gebiete,4 (1965), pp. 175–186.
2. Handbuch der Lehre von der Verteilung der Primzahlen, 1909, Bd.I. p. 222.
3. The starting point of these investigations was the question ofA. Schinzel, whether or not for almost allP'sO(P) is even.
4. Throughout this paper log v n meansv-times iterated logarithms.
5. See e. g.J. Riordan's bookAn introduction to combinatorial analysis, New York, 1958.