[1] B. FISHER: Theorems on mappings satisfying a rational inequality. Comment. Math. Univ. Carolinae 19 (1978), 37-44. MR 0488004 | Zbl 0496.54038

[2] J. ACHARI: On a family of maps and fixed points. C. R. Acad. Bulgare des Sciences, 2 (1977), 171-174. MR 0515151 | Zbl 0371.54075

[3] TORU KITA: A common fixed point theorem for multivalued mappings In complete metric space. Mathematica Japonicae, 33 (1977), 113-116. MR 0474253

[4] I. A. RUS: Fixed point theorems for multivalued mappings in oomplete metric space. Mathematica Japonicae, 20 (1975), 21-24. MR 0418075

[5] D. G. MAIA: Un osservazione sulle contrazione metriche. Rend. Semin. Mat. Univ. Padova, 40 (1968), 139-143. MR 0229103

[6] K. ISÉKI: A common fixed point theorem. Rend. Semin. Mat. Univ. Padova, 55 (1975), 13-H. MR 0407825

[7] I. A. RUS: On a fixed point theorem of Maia. Studia Univ. Babes-Bolyai, Mathematica, XXII (1977), 40-42. MR 0438317 | Zbl 0374.54039

[8] I. A. RUS: On a fixed point theorem in a set with two metrics. L'Analyse numérique et la théorie de l approximation, 6 (1977). 197-202. MR 0645168 | Zbl 0383.54028

[9] K. L. SINGH: A note on common fixed points. Bull. Math. Soc. Sci. Math. R. S. R., 22 (70) (1978), 95-98. MR 0494053 | Zbl 0388.54032

[10] V. POPA: Fixed point theorems for multifunctions. Studia Univ. Babes-Bolyai, Mathematica, XXVII (1982), 21-27. Zbl 0503.47046

[11] V. POPA: Fixed point theorems for a sequence of multifunctions. (to appear - Bull. Math. Soc. Sci. Math. R. S. R.) MR 0771713 | Zbl 0551.54035