@article{Dourado2014, 
     author = "Dourado, Mitre C. and Oliveira, Rodolfo A. and Protti, F\'{a}bio", 
     doi = "10.1007/s10479-014-1607-5", 
     issn = "0254-5330", 
     journal = "Annals of Operations Research", 
     link = "http://link.springer.com/10.1007/s10479-014-1607-5", 
     month = "may", 
     number = "1", 
     pages = "155--171", 
     title = "Algorithmic Aspects of Steiner Convexity and Enumeration of Steiner Trees", 
     uri = "http://link.springer.com/10.1007/s10479-014-1607-5", 
     volume = "223", 
     year = "2014", 
}

Problems: 263