@InProceedings{Ste09,
   author        = {Monika Steinov{\'a}},
   title         = {Approximability of the Minimum Steiner Cycle Problem},
   booktitle     = {Proc.~of the 5th Doctoral Workshop on Mathematical 
                    and Engineering Methods in Computer Science (MEMICS~2009)},
   year          = {2009},
   pages         = {176--183},
}