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We review some facts about AdS2xS2 branes in AdS3xS3 with a Neveu-Schwarz background, and consider the case of Ramond-Ramond backgrounds. We compute the spectrum of quadratic fluctuations in the low-energy approximation and discuss the open-string geometry.doi:10.1088/1126-6708/2003/03/007 fatcat:m2z7ix4q7nhc3g37iqo5c6vvka