@article {2009AJ....137.4282M, title = {Mass Outflow and Chromospheric Activity of Red Giant Stars in Globular Clusters. II. M13 and M92}, journal = {\aj}, volume = {137}, number = {5}, year = {2009}, month = {may}, pages = {4282-4295}, keywords = {Astrophysics - Solar and Stellar Astrophysics, globular clusters: general, globular clusters: individual: M13 M15 M92 NGC 2808, stars: AGB and post-AGB, STARS: CHROMOSPHERES, stars: mass loss}, doi = {10.1088/0004-6256/137/5/4282}, author = {M{\'e}sz{\'a}ros, Sz. and Dupree, A.~K. and Szalai, T.} }