@article{RO_1984__18_4_415_0,
     author = {Mrozek, Marian},
     title = {A note on minimum-dummy-activities {PERT} networks},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {415--421},
     publisher = {EDP-Sciences},
     volume = {18},
     number = {4},
     year = {1984},
     mrnumber = {776773},
     zbl = {0551.90094},
     language = {en},
     url = {http://www.numdam.org/item/RO_1984__18_4_415_0/}
}