• [1]

    H. B. G. Casimir, Proc. kQn. Med. Akad. Wet 51(1948), 793.[2] C. Iczykson and J-B Zubet, Quantum. Field Theory, (MCGRAW-HILL). p. 138[3] B. V. Deryagin and I. I. Abricosova, J. Exp. Theor. Phys. U. S. S. R. 21(1951) 945; M. J. Sparnaay,Phyrica, 24(1958), 751. D. Tabor and R. M. S. Winterton. Proc. Roy. Soc., A312(1969), 435.[4] G. Plunien, B. Miiller and W. Greiner, Phys. Rep., 134(1986), 87.[5] E. LindelSf, Le Calcul des Residues, (Gauthier-Villars, Paris, France, 1905) Chap. 11I.[6] L. H. Ford, Phys. Rev. D., 38(1988), 529.[7] Yu-Liang Liu and Guang-jiong Ni, .Phys. Rev., D38(1988), 3840.[8] I. S. Gradshteyn and 1. M. Ryzhik, Table of Integrals, Series and Products (Academic Press, 1980), p.325, 1074.[9] H. Verschelde, L. Wine and P. Phariseau, Phys. Lett., 149B(1984), 396.