Update URLs in README.md

Author: MakisH

docs/README.md

@@ -60,7 +60,7 @@ Please cite this adapter using our [reference paper in the OpenFOAM Journal](htt
 This project is actively maintained on [precice/openfoam-adapter](https://github.com/precice/openfoam-adapter). Current maintainers: [@MakisH](https://github.com/MakisH/) and [@DavidSCN](https://github.com/DavidSCN).
 
 This adapter was developed as part of [Gerasimos Chourdakis' master's thesis](https://mediatum.ub.tum.de/1462269) [2].
-It is based on [previous work](https://github.com/ludcila/CHT-preCICE) by Lucia Cheung ([master's thesis](https://www5.in.tum.de/pub/Cheung2016_Thesis.pdf) [3], in cooperation with [SimScale](https://www.simscale.com/)).
+It is based on [previous work](https://github.com/ludcila/CHT-preCICE) by Lucia Cheung ([master's thesis](https://www.simscale.com/) [3], in cooperation with [SimScale](https://www.simscale.com/)).
 
 The fluid-structure interaction module was developed in close collaboration between Gerasimos Chourdakis and Derek Risseeuw (TU Delft), in the context of the [master's thesis of the latter](http://resolver.tudelft.nl/uuid:70beddde-e870-4c62-9a2f-8758b4e49123) [4]. We would also like to thank David Schneider (Univ. Siegen / TUM) and Maximilian Müller (TU Braunschweig) for sharing the code and experience of their similar previous work.
 
@@ -79,7 +79,7 @@ The adapter is [easily extensible](https://precice.org/adapter-openfoam-extend.h
 URL: https://mediatum.ub.tum.de/1462269
 
 [3] Lucia Cheung Yau. Conjugate heat transfer with the multiphysics coupling library preCICE. Master’s thesis, Department of Informatics, Technical University of Munich, 2016.<br/>
-URL: https://www5.in.tum.de/pub/Cheung2016_Thesis.pdf
+URL: https://mediatum.ub.tum.de/1461907
 
 [4] Derek Risseeuw. Fluid Structure Interaction Modelling of Flapping Wings. Master's thesis, Faculty of Aerospace Engineering, Delft University of Technology, 2019.<br/>
 URL: http://resolver.tudelft.nl/uuid:70beddde-e870-4c62-9a2f-8758b4e49123