Update citation information

README.md

@@ -160,21 +160,17 @@ Russian
 ### Citation Information
 
 ```
-@article{DBLP:journals/corr/abs-1912-09723,
-  author    = {Pavel Efimov and
-               Leonid Boytsov and
-               Pavel Braslavski},
-  title     = {SberQuAD - Russian Reading Comprehension Dataset: Description and
-               Analysis},
-  journal   = {CoRR},
-  volume    = {abs/1912.09723},
-  year      = {2019},
-  url       = {http://arxiv.org/abs/1912.09723},
-  eprinttype = {arXiv},
-  eprint    = {1912.09723},
-  timestamp = {Fri, 03 Jan 2020 16:10:45 +0100},
-  biburl    = {https://dblp.org/rec/journals/corr/abs-1912-09723.bib},
-  bibsource = {dblp computer science bibliography, https://dblp.org}
+@InProceedings{sberquad,
+doi       = {10.1007/978-3-030-58219-7_1},
+author    = {Pavel Efimov and
+             Andrey Chertok and
+             Leonid Boytsov and
+             Pavel Braslavski},
+title     = {SberQuAD -- Russian Reading Comprehension Dataset: Description and Analysis},
+booktitle = {Experimental IR Meets Multilinguality, Multimodality, and Interaction},
+year      = {2020},
+publisher = {Springer International Publishing},
+pages     = {3--15}
 }
 ```