* articles.bib (DenZha2019approxhv): New.

articles.bib

@@ -4732,6 +4732,20 @@ @Article{DenAroGosPas1990
   alias =        {DAGP90},
 }
 
+@Article{DenZha2019approxhv,
+  author       = {Deng, Jingda} #and# Zhang_Qingfu,
+  title        = {Approximating Hypervolume and Hypervolume Contributions Using
+                  Polar Coordinate},
+  journal      = tec,
+  year         = 2019,
+  volume       = 23,
+  number       = 5,
+  pages        = {913--918},
+  month        = oct,
+  annote       = {Proposed approximating the hypervolume using scalarizations},
+  doi          = {10.1109/tevc.2019.2895108}
+}
+
 @Article{DerGarMolHer2011stats,
   title =        {A practical tutorial on the use of nonparametric statistical
                   tests as a methodology for comparing evolutionary and swarm