@article{ZNSL_2019_488_a0,
     author = {V. A. Buslov},
     title = {The structure of directed forests of minimal weight: algebra of subsets of the set of vertices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--30},
     publisher = {mathdoc},
     volume = {488},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2019_488_a0/}
}