4Phelps, E. S. et al, 1970, Microeconomic Foundations of Employment and Unemployment, Norton.
5Daria V. Nesterova, Klara Z. Sabrianova,Investment in human capital under economic transformation in Russia. working paper series No 99/04, (December,1998). EERC
6Harry J . Holzer. Employed and unemployed job search: a comparison of choices and outcomes among youth or Holzer Harry J. job search by Employed and unemployed L. Industrialand Labor Relations Review. Vol. 40,No. 4,July 1987.pp 601-611
