[1] Achari,J.Rev.Romania Math.Pures et Appl.,24(1979) 179-182.
[2] Ray,B.K.,Nanta Math.,8(1975),9-20.
[3] Rus,I.A.,Math.Japonica.20(1975),Special Issue.21-24.
[4] Kasahara,S.,Math.Sem.Notes,4 (1976),181-193.
[5] Czerwik,S.Aequations Math.,16(1977),297-302.
[6] Kita,T.,Math.Japonica,22(1977),113-116.
[7] Bose,R.K.,R.N.,Mukheriee,Tamking J.Math.,13(1977),245-248.
[8] Chen M-P.;Shih M-H.,J Math.Anul.Appl.,71(1979),516-524.
[9] Ni Luqun;Yao Jingqi and Zhao Hanzhang,Chin.Ann.of Math.,1,1(1980),63-74.
[10] Nadler,S.B.,Pacific J.Math.,30(1969),475-488.
[11] Itoh,S.,Pacific J.Math.,68(1977),85-90.
[12] Cheng Shih-Sen,Nature J.,4(1981),476-477.
[13] Cheng Shih-Sen,Sichuan Univ.J.4(1980),61-68.
[14] Wang Zi-kun,Advances Math.,5(1962),45-71.
[15] Bharucha-Reid,A.T.,Random Integral Equations,Acad.Press,New York(1972).
[16] Bharucha-Reid,A.T.,Bull.Amer.Math.Soc.,82(1976),641-657.
[17] Hanš,O.,Czech,Math.J.,7(1957),154-158.
[18] Špa?ek.A.,Czech.Math.J.5(1955),462-466.
[19] Himmelberg,C.J.,Fund.Math.,87(1975),53-72.
[20] Assad,N.A.;Kirk,W.A.,Pacific J.Math.,43(1972),553-562.
[21] Ding Xie ping,Sichuan Shiyuan Xuebao,A Special Issue of Math.(1981),10-14.
[22] Kuratowski,K.;Ryll-Nardzewski,C.,Bull.Acad.Polon.Sci.Ser.Sci.Math.Astr.Phys.,13(1965),397-403.
[23] Castaing,C.,M.Valadier,Convex Analysis and Measurable Multifunctions,Springer-Verlag (1977),580.