Blocking sets of nonsecant lines to a conic in PG (2, q ), q odd

In a previous paper 1, all point sets of minimum size in PG (2, q ), blocking all external lines to a given irreducible conic ${\cal C}$ , have been determined for every odd q . Here we obtain a similar classification for those point sets of minimum size, which meet every external and tangent line to ${\cal C}$ . © 2004 Wiley Periodicals, Inc.