Optical confirmation and redshift estimation of the Planck cluster candidates overlapping the Pan-STARRS Survey. - Liu, J.; Hennig, C.; Desai, S.; Hoyle, B.; Koppenhoefer, J.; Mohr, J. J.; Paech, K.; Burgett, W. S.; Chambers, K. C.; Cole, S.; Draper, P. W.; Kaiser, N.; et al. (Monthly Notices of the Royal Astronomical Society, 2015)