Identification of DQ Serpentis and DT Serpentis as symbiotic stars D. Cieslinski, J. E. Steiner, F. Elizalde and M. G. Pereira Astron. Astrophys. Suppl. Ser., 124 1 (1997) 57-60 Published online: 15 July 1997 DOI: 10.1051/aas:1997179