@article{Conte2018, 
     author = "Conte, Alessio and Grossi, Roberto and Marino, Andrea and Rizzi, Romeo", 
     doi = "10.1016/j.dam.2017.08.002", 
     issn = "0166218X", 
     journal = "Discrete Applied Mathematics", 
     pages = "22--37", 
     publisher = "Elsevier B.V.", 
     title = "{Efficient enumeration of graph orientations with sources}", 
     volume = "246", 
     year = "2018", 
}

Problems: 513 514 515 516 517