References
- Samko , S.G. , Kilbas , A.A. and Marichev , O.I. 1987 . Integrals and derivatives of frac-tional order and some of their applications , 688 – 688 . Ed. and with a preface by S.M. NIKOL'SKII. Nauka i Tekhnika, Minsk . Russian
- Karr , CH. and Chouv , CH. 1966 . Quantitative methods of adopting solutions in administration and economy , 464 – 464 . M., Mir . Russian