Optical and Near-Infrared UBVRIJHK Photometry for the RR Lyrae Stars in the Nearby Globular Cluster M4 (NGC 6121)
Journal article published in 2014 by
P.~B Stetson,
V.~F Braga 
,
M. Dall'Ora,
G. Bono,
R. Buonanno,
I. Ferraro,
G. Iannicola,
M. Marengo,
J. Neeley
,
M. Dall'Ora,
G. Bono,
R. Buonanno,
I. Ferraro,
G. Iannicola,
M. Marengo,
J. Neeley
