add more modelica proceedings 2019

doc/bibliography/openmodelica.bib

@@ -1341,6 +1341,20 @@ @InProceedings{openmodelica.org:lie:modelica:2019
   doi       = {10.3384/ecp19157699}
 }
 
+@InProceedings{openmodelica.org:Giovanni:modelica:2019,
+  author = {Giovanni Agosta and Emanuele Baldino and Francesco Casella and Stefano Cherubin and Alberto Leva and Federico Terraneo},
+  title     = {{Towards a High-Performance Modelica Compiler}},
+  crossref  = {modelica2019},
+  doi       = {10.3384/ecp19157313}
+}
+
+@InProceedings{openmodelica.org:Bartolini:modelica:2019,
+  author = {Andrea Bartolini, Francesco Casella, Adrien Guironnet},
+  title     = {{Towards Pan-European Power Grid Modelling in Modelica: Design Principles and a Prototype for a Reference Power System Library}},
+  crossref  = {modelica2019},
+  doi       = {10.3384/ecp19157627}
+}
+
 @InProceedings{openmodelica.org:fritzson:modelicaUS:2018,
   author    = {Peter Fritzson and Adrian Pop and Adeel Asghar and Bernhard Bachmann and Willi Braun and Robert Braun and Lena Buffoni and Francesco Casella and Rodrigo Castro and Alejandro Danós and Rüdiger Franke and Mahder Gebremedhin and Bernt Lie and Alachew Mengist and Kannan Moudgalya and Lennart Ochel and Arunkumar Palanisamy and Wladimir Schamai and Martin Sjölund and Bernhard Thiele and Volker Waurich and Per Östlund},
   title     = {{The OpenModelica Integrated Modeling, Simulation and Optimization Environment}},

doc/bibliography/papers.cite

@@ -3,6 +3,8 @@ openmodelica.org:thiele:modelica:2019
 openmodelica.org:fritzson:modelica:2019
 openmodelica.org:pop:modelica:2019
 openmodelica.org:lie:modelica:2019
+openmodelica.org:Giovanni:modelica:2019
+openmodelica.org:Bartolini:modelica:2019
 openmodelica.org:berger:eoolt:2017
 openmodelica.org:fritzson:modelicaUS:2018
 openmodelica.org:alachew:modelica:2017