Two Fixed Point Theorems in Normed Spaces
Mathematica Moravica, Tome 1 (1997) no. 1.

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In this paper we consider the convergence of sequences defined by $x_{n+1}=\lambda x_{n}+(1-\lambda)f(x_{n}$, for $\lambda\in(0,1)$ to a fixed point of mapping $f:X\to X$ where $X$ is a $f_{\lambda}$-orbitally completed subset of normed linear space. 
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Branislav Mijajlović. Two Fixed Point Theorems in Normed Spaces. Mathematica Moravica, Tome 1 (1997) no. 1. https://geodesic-test.mathdoc.fr/item/MM3_1997_1_1_a10/