Cell senescence and telomere shortening induced by a new series of specific G-quadruplex DNA ligands. - Riou,J.F.; Guittat,L.; Mailliet,P.; Laoui,A.; Renou,E.; Petitgenet,O.; Megnin-Chanet,F.; Helene,C.; Mergny,J.L. (PNAS, 2002)