update sub.bib of Stephan Beyer submission

Stephan_Beyer/sub.bib

-@inproceedings{BCHK16,
- author    = {Stephan Beyer and Markus Chimani and Ivo Hedtke and Michal Kotrbc{\'{\i}}k},
- title     = {{A} {Practical} {Method} for the {Minimum} {Genus} of a {Graph}: {Models} and {Experiments}},
- booktitle = {Experimental Algorithms---Proceedings 15th {SEA} 2016, St. Petersburg},
- editor    = {Andrew V. Goldberg and Alexander S. Kulikov},
- pages     = {75--88},
- year      = {2016},
- series    = {LNCS},
- volume    = {9685},
- publisher = {Springer},
- doi       = {10.1007/978-3-319-38851-9_6}
+@inproceedings{BCHK16,
+ author    = {Stephan Beyer and Markus Chimani and Ivo Hedtke and Michal Kotrbc{\'{\i}}k},
+ title     = {{A} {Practical} {Method} for the {Minimum} {Genus} of a {Graph}: {Models} and {Experiments}},
+ booktitle = {Experimental Algorithms---Proceedings 15th {SEA} 2016, St. Petersburg},
+ editor    = {Andrew V. Goldberg and Alexander S. Kulikov},
+ pages     = {75--88},
+ year      = {2016},
+ series    = {LNCS},
+ volume    = {9685},
+ publisher = {Springer},
+ doi       = {10.1007/978-3-319-38851-9_6}
+}
+
+@article{DBLP:journals/comgeo/WelzlBGLTTV97,
+author    = {Giuseppe {Di Battista} and Ashim Garg and Giuseppe Liotta and Roberto Tamassia and Emanuele Tassinari and Francesco Vargiu},
+title     = {An Experimental Comparison of Four Graph Drawing Algorithms},
+journal   = {Comput. Geom.},
+volume    = {7},
+pages     = {303--325},
+year      = {1997},
+url       = {https://doi.org/10.1016/S0925-7721(96)00005-3},
+doi       = {10.1016/S0925-7721(96)00005-3}
 }
\ No newline at end of file