Update README.md

README.md

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 This repository contains instances that originate from the computational tests in 
 ```
 @article{Karlsson_COR_2022,
-Author = {Karlsson, Emil and R{\"o}nnberg, Elina},
-Journal = {Computers \& Operations Research},
-Title = {Logic-based {Benders} decomposition with a partial assignment acceleration
+author = {Karlsson, Emil and R{\"o}nnberg, Elina},
+journal = {Computers \& Operations Research},
+title = {Logic-based {Benders} decomposition with a partial assignment acceleration
 technique for avionics scheduling},
 doi={10.1016/j.cor.2022.105916},
-Year = {2022},
+year = {2022},
 volume = {146},
 pages = {105916},
 }