K. Łobacz, J. Klimek, and P. Niedzielski, “The Impact of Big Companies from the Modern Business Services Sector on the Innovativeness of Micro-, Small- and Medium Enterprises – Study Based on the West Pomerania Voivodeship”, Prace KGP PTG, vol. 32, no. 3, pp. 38–53, Sep. 2018.