#311-fix bibliography in README.md

Done. Modified also the head of file with the library banner.

Author: schmouk

README.md

@@ -1,4 +1,6 @@
-# CppRandLib  [![license](http://img.shields.io/github/license/schmouk/cpprandlib.svg?style=plastic&labelColor=blueviolet&color=lightblue)](https://github.com/schmouk/cpprandlib/license)  [![Latest release](http://img.shields.io/github/release/schmouk/cpprandlib.svg?style=plastic&labelColor=blueviolet&color=success)](https://github.com/schmouk/cpprandlib/releases)  [![code_coverage](https://img.shields.io/badge/code_coverage-100%25-success?style=plastic&labelColor=blueviolet)]()  [![tests](https://img.shields.io/badge/tests-passed-success?style=plastic&labelColor=blueviolet)]()
+<img src="lib-banner.jpg" alt="Library banner">
+
+[![license](http://img.shields.io/github/license/schmouk/cpprandlib.svg?style=plastic&labelColor=blueviolet&color=lightblue)](https://github.com/schmouk/cpprandlib/license)  [![Latest release](http://img.shields.io/github/release/schmouk/cpprandlib.svg?style=plastic&labelColor=blueviolet&color=success)](https://github.com/schmouk/cpprandlib/releases)  [![code_coverage](https://img.shields.io/badge/code_coverage-100%25-success?style=plastic&labelColor=blueviolet)]()  [![tests](https://img.shields.io/badge/tests-passed-success?style=plastic&labelColor=blueviolet)]()
 Many best in class pseudo random generators grouped into one simple library - c++11 and c++20 versions.
 
 This is a c++ counterpart of library PyRandLib (Python).
@@ -1223,10 +1225,10 @@ DOI: https://doi.org/10.1145/3159444, https://doi.org/10.48550/arXiv.1505.06582
 
 
 **[12]** Marsaglia, G. 1972.  
-*The structure of linear congruential sequences.*  
+"*The structure of linear congruential sequences.*"  
 In Applications of Number Theory to Numerical Analysis, S. K. Zaremba, Ed. Academic Press, 249–285.
 
 
 **[13]** Brown, F. B. and Nagaya, Y. 2002.  
-*The MCNP5 random number generator.*  
+"*The MCNP5 random number generator.*"  
 Tech. rep. LA-UR-02-3782, Los Alamos National Laboratory