Rc. Vaughan, ON A VARIANCE ASSOCIATED WITH THE DISTRIBUTION OF GENERAL SEQUENCES IN ARITHMETIC PROGRESSIONS - II, Philosophical transactions-Royal Society of London. Physical sciences and engineering, 356(1738), 1998, pp. 793-809
Asymptotic formulae of Montgomery-Hooley type are obtained for general
sequences which, for relatively small moduli, have an approximate asy
mptotic distribution in each residue class.