Galactic bulge population II Cepheids in the VVV survey: period-luminosity relations and a distance to the Galactic centreA. Bhardwaj, M. Rejkuba, D. Minniti, F. Surot, E. Valenti, M. Zoccali, O. A. Gonzalez, M. Romaniello, S. M. Kanbur and H. P. SinghA&A, 605 (2017) A100DOI: https://doi.org/10.1051/0004-6361/201730841
