https://www.researchgate.net/publication/299604992_Contact_Force_Models_for_Multibody_Dynamics

http://www.kves.uniza.sk/kvesnew/dokumenty/DREP/Filters/SecondOrderFilters.pdf

https://www.pdx.edu/nanogroup/sites/www.pdx.edu.nanogroup/files/NOTES_Transfer function Laplace Transormation Active filter_0.pdf

https://lpsa.swarthmore.edu/Representations/SysRepTransformations/TF2SS.html

https://docs.microsoft.com/ko-kr/dotnet/csharp/programming-guide/concepts/linq/sample-xsd-file-customers-and-orders1