LONDON.- The Summer Exhibition, from 14 July until 12 August, will showcase a wide range of works from the stable of artists represented by the Alan Cristea Gallery, the largest dealer and publisher of 20th Century and contemporary prints in Europe. Including paintings, works on paper, ceramics, sculpture and installations, and with prices ranging from £750 to £50,000, this show will focus on the work of Royal Academicians including Gillian Ayres, Allen Jones, Ian McKeever, Lisa Milroy, Mimmo Paladino and Joe Tilson. A focal point of the show will be works by Michael Craig-Martin and Howard Hodgkin, both of whom have both been commissioned to design posters for the London 2012 Olympics and Paralympics Games. The Summer Exhibition will showcase a number of works by Michael Craig-Martin, who