Update README.md

Author: Gagniuc

README.md

@@ -24,4 +24,6 @@ Spectral Forecast equation VB6 app 1.0 - is a demo application designed in Visua
 
 # References
 
+<i>Paul A. Gagniuc et al. Spectral forecast: A general purpose prediction model as an alternative to classical neural networks. Chaos 30, 033119 (2020).</i>
+
 <i>Paul A. Gagniuc. Algorithms in Bioinformatics: Theory and Implementation. John Wiley & Sons, Hoboken, NJ, USA, 2021, ISBN: 9781119697961.</i>