@article{ZNSL_2018_475_a0,
     author = {V. A. Buslov},
     title = {The structure of minimum-weight directed forests: related forests and convexity inequalities},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--21},
     publisher = {mathdoc},
     volume = {475},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_475_a0/}
}