Blue and yellow long-period variables in the direction of the Small Magellanic Cloud R. E. Mennickent, L. Cidale, G. Pietrzyński, W. Gieren and B. Sabogal A&A, 457 3 (2006) 949-961 Published online: 12 September 2006 DOI: 10.1051/0004-6361:20065361