diff --git a/AllBibTex.bib b/AllBibTex.bib
index 4ef58b5..86e5554 100644
--- a/AllBibTex.bib
+++ b/AllBibTex.bib
@@ -9719,7 +9719,6 @@ year = {2013}
   doi       = {10.1016/s0045-7825(02)00559-5},
   publisher = {Elsevier BV},
   type      = {Journal Article},
-  url       = {https://doi.org/10.1016%2Fs0045-7825%2802%2900559-5},
 }
 
 @Article{kharevych2009numerical,
@@ -11968,3 +11967,94 @@ author = {Yvonnet, Julien and Auffray, Nicolas and Monchiet, Vincent},
 
 
 @Comment{jabref-meta: databaseType:bibtex;}
+
+@inproceedings{shapiro1995parametric,
+  title={What is a parametric family of solids?},
+  author={Shapiro, Vadim and Vossler, Donald L},
+  booktitle={Proceedings of the third ACM symposium on Solid modeling and applications},
+  pages={43--54},
+  year={1995}
+}
+
+@inproceedings{shah1998designing,
+  title={Designing with parametric cad: Classification and comparison of construction techniques},
+  author={Shah, Jami J},
+  booktitle={International Workshop on Geometric Modelling},
+  pages={53--68},
+  year={1998},
+  organization={Springer}
+}
+
+@article{requicha1980representations,
+  title={Representations for rigid solids: Theory, methods, and systems},
+  author={Requicha, Aristides G},
+  journal={ACM Computing Surveys (CSUR)},
+  volume={12},
+  number={4},
+  pages={437--464},
+  year={1980},
+  publisher={ACM New York, NY, USA}
+}
+
+@article{urick2019watertight,
+  title={Watertight Boolean operations: A framework for creating CAD-compatible gap-free editable solid models},
+  author={Urick, Benjamin and Marussig, Benjamin and Cohen, Elaine and Crawford, Richard H and Hughes, Thomas JR and Riesenfeld, Richard F},
+  journal={Computer-aided design},
+  volume={115},
+  pages={147--160},
+  year={2019},
+  publisher={Elsevier}
+}
+
+@article{rank2011shell,
+  title={Shell finite cell method: a high order fictitious domain approach for thin-walled structures},
+  author={Rank, Ernst and Kollmannsberger, Stefan and Sorger, Ch and D{\"u}ster, Alexander},
+  journal={Computer Methods in Applied Mechanics and Engineering},
+  volume={200},
+  number={45-46},
+  pages={3200--3209},
+  year={2011},
+  publisher={Elsevier}
+}
+
+@article{rossignac2022ibnc,
+  title={IBNC: Integrated Boundary and Natural CSG for Polyhedra (Review, Simplifications, and Integration of Prior Art)},
+  author={Rossignac, Jarek},
+  journal={Computer-Aided Design},
+  pages={103296},
+  year={2022},
+  publisher={Elsevier}
+}
+
+@article{jones20063d,
+  title={3D distance fields: A survey of techniques and applications},
+  author={Jones, Mark W and Baerentzen, J Andreas and Sramek, Milos},
+  journal={IEEE Transactions on visualization and Computer Graphics},
+  volume={12},
+  number={4},
+  pages={581--599},
+  year={2006},
+  publisher={IEEE}
+}
+
+@article{zhu2016topology,
+  title={Topology optimization in aircraft and aerospace structures design},
+  author={Zhu, Ji-Hong and Zhang, Wei-Hong and Xia, Liang},
+  journal={Archives of Computational Methods in Engineering},
+  volume={23},
+  number={4},
+  pages={595--622},
+  year={2016},
+  publisher={Springer}
+}
+
+@inproceedings{nitsche1971variationsprinzip,
+  title={{\"U}ber ein Variationsprinzip zur L{\"o}sung von Dirichlet-Problemen bei Verwendung von Teilr{\"a}umen, die keinen Randbedingungen unterworfen sind},
+  author={Nitsche, Joachim},
+  booktitle={Abhandlungen aus dem mathematischen Seminar der Universit{\"a}t Hamburg},
+  volume={36},
+  number={1},
+  pages={9--15},
+  year={1971},
+  organization={Springer}
+}
\ No newline at end of file