Collective oscillations in spatially modulated exciton-polariton condensate arraysAndrey A. Tikhomirov, Oleg I. Kanakov, Boris L. Altshuler and Mikhail V. IvanchenkoEur. Phys. J. B, 88 2 (2015) 37DOI: https://doi.org/10.1140/epjb/e2014-50838-0