@Article{616133,
     author = "Vitalii Vakulenko, Tetiana Nidzelska",
     title = "Methodological principles of clustering in agricultural sector of Ukraine",
     year =  2018,
     volume =  ,
     number =  2(24),
     journal =  Edukacja - Technika - Informatyka,
     pages =  s. 213-219,
    }