1. Bombieri, E.: Le grand crible dans la théorie analytique des nombres. Soc. Math. France, Astérisque No. 18 (1974)
2. Fogels, E.: On the zeros ofL-functions. Acta Arith.11, 67?96 (1965)
3. Gallagher, P.X.: A large sieve density estimate near ?=1. Inventiones Math.11, 329?339 (1970)
4. Jutila, M.: On Linnik's constant. (To appear)
5. Knapowski, S.: On Linnik's theorem concerning exceptionalL-zeros. Publ. Math. Debrecen9, 168?178 (1962)