Add thesis citation

CITATION.bib

@@ -6,3 +6,18 @@ @misc{ImplicitDifferentiation.jl
 	year    = {2024},
 	month   = {4}
 }
+
+@phdthesis{dalle:tel-04053322,
+  TITLE = {{Machine learning and combinatorial optimization algorithms, with applications to railway planning}},
+  AUTHOR = {Dalle, Guillaume},
+  URL = {https://pastel.hal.science/tel-04053322},
+  NUMBER = {2022ENPC0047},
+  SCHOOL = {{{\'E}cole des Ponts ParisTech}},
+  YEAR = {2022},
+  MONTH = Dec,
+  KEYWORDS = {Machine learning ; Combinatorial optimization ; Latent variable models ; Differentiable optimization layers ; Julia language ; Railway planning ; Apprentissage statistique ; Optimisation combinatoire ; Mod{\`e}les {\`a} variables latentes ; Couches diff{\'e}rentiables d'optimisation ; Langage Julia ; Planification ferroviaire},
+  TYPE = {Theses},
+  PDF = {https://pastel.hal.science/tel-04053322/file/TH2022ENPC0047.pdf},
+  HAL_ID = {tel-04053322},
+  HAL_VERSION = {v1},
+}