added two journals

journal-2021.bib

@@ -174,3 +174,27 @@
 	url2 = {https://doi.org/10.1613/jair.1.12755},
 	url = {https://arxiv.org/abs/2007.04948}
 }
+
+@article{journal-BBHN21,
+	title = {Parameterized Algorithms for Power-Efficiently Connecting Wireless Sensor Networks: Theory and Experiments},
+	author={Matthias Bentert and René van Bevern and André Nichterlein and Rolf Niedermeier and Pavel V. Smirnov},
+	journal = {Informs Journal on Computing},
+	year = {2021},
+	volume={0},
+  	pages={1--29},
+	type = {journal2021},
+	url2 = {https://doi.org/10.1287/ijoc.2020.1045},
+	url = {https://arxiv.org/abs/1706.03177}
+}
+
+@article{journal-BBHN21,
+	title = {Tree Containment With Soft Polytomies},
+	author={Matthias Bentert and Mathias Weller},
+	journal = {Journal of Graph Algorithms and Applications},
+	year = {2021},
+	volume={25},
+  	pages={417--436},
+	type = {journal2021},
+	url2 = {https://doi.org/10.7155/jgaa.00565},
+	url = {https://hal.archives-ouvertes.fr/hal-01734619}
+}
\ No newline at end of file