Drejeris, R., J. Bivainis, Živilė Tunčikienė, and E. Drejerienė. “Determining the Purposefulness of New Services on the Grounds of the Results of Quantitative Analysis”. Journal of Business Economics and Management, vol. 14, no. 4, Sept. 2013, pp. 791-05, doi:10.3846/16111699.2013.772917.