Update README.md

README.md

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 Ildar Daminov, Anton Prokhorov, Raphael Caire, Marie-Cécile Alvarez-Herault, "Energy limit of oil‐immersed transformers: A concept and its application in different climate conditions". IET Generation, Transmission & Distribution, 15(3), 495-507.  https://doi.org/10.1049/gtd2.12036 
 
 ## More about DTR of power transformers 
-<img align="left" alt="Coding" width="250" src="https://media-exp1.licdn.com/dms/image/C4E22AQFVhDYtt2te_w/feedshare-shrink_1280/0/1652876006660?e=1668038400&v=beta&t=eBRX9SszlDbTvlrkZOmlU_YBncHo2tHmdpjqxRxikbA">This paper research is a part of PhD thesis "Dynamic Thermal Rating of Power Transformers: Modelling, Concepts, and Application case". The full text of PhD thesis is available on [Researchgate](https://www.researchgate.net/publication/363383515_Dynamic_Thermal_Rating_of_Power_Transformers_Modelling_Concepts_and_Application_case) or [HAL theses](https://tel.archives-ouvertes.fr/tel-03772184). Other GitHub repositories on DTR of power transformers:
+<img align="left" alt="Coding" width="250" src="https://sun9-19.userapi.com/impg/3dcwjraHJPNgrxtWv7gEjZTQkvv5T0BttTDwVg/e9rt2Xs8Y5A.jpg?size=763x1080&quality=95&sign=7c57483971f31f7009fbcdce5aafd97e&type=album">This paper research is a part of PhD thesis "Dynamic Thermal Rating of Power Transformers: Modelling, Concepts, and Application case". The full text of PhD thesis is available on [Researchgate](https://www.researchgate.net/publication/363383515_Dynamic_Thermal_Rating_of_Power_Transformers_Modelling_Concepts_and_Application_case) or [HAL theses](https://tel.archives-ouvertes.fr/tel-03772184). Other GitHub repositories on DTR of power transformers:
 * Article: Assessment of dynamic transformer rating, considering current and temperature limitations. [GitHub repository](https://github.com/Ildar-Daminov/Assessment_Dynamic_Thermal_Rating_of_Transformers)
 * Article: Demand Response Coupled with Dynamic Thermal Rating for Increased Transformer Reserve and Lifetime. [GitHub repository](https://github.com/Ildar-Daminov/Demand-response-coupled-with-DTR-of-transformers)
 * Conference paper: Optimal ageing limit of oil-immersed transformers in flexible power systems [GitHub repository](https://github.com/Ildar-Daminov/MATLAB-code-for-CIRED-paper)