update README to contain most current publication

Author: rosphil

README.md

@@ -36,6 +36,7 @@ The full license text can be found in the LICENSE file in the root directory of
 ## Related publications
 - P. Rosner and M. Lienkamp, "Unlocking the Joint Potential of Electric Mobility and Rural Electrification - A Concept for Improved Integration using Modular Batteries," 2022 IEEE PES/IAS PowerAfrica, Kigali, Rwanda, 2022, pp. 1-5, https://doi.org/10.1109/PowerAfrica53997.2022.9905305.
 - P. Rosner, B. Dietermann, M. Brödel and M. Lienkamp, "REVOL-E-TION: A Flexible and Scalable Model to Optimally Integrate Bidirectional EV Fleets in Local Energy Systems", Poster, 2024 Vehicle2Grid Conference, Münster, Germany, 2024, https://doi.org/10.13140/RG.2.2.19632.16648
+- P. Rosner, B. Dietermann, M. Brödel, A. Paper and M. Lienkamp, "REVOL-E-TION: A Flexible and Scalable Investment Optimization Toolbox for Local Energy Systems Incorporating Electric Vehicle Fleets", Under Review, Available at SSRN, https://dx.doi.org/10.2139/ssrn.5127283
 
 ## Description  
 REVOL-E-TION is a scalable generator for (mixed integer) linear energy system models of local energy systems with or without electric vehicle fleets.