Update README

README.md

@@ -16,22 +16,26 @@ This project can be used by researchers, sports enthusiasts, and anyone interest
 
 ## 🔬 Included disc models
 
-#### V. Morrison, “The physics of frisbees,” Mount Allison University Physics Department, vol. 1, 2005.
+#### S. Hummel, "Frisbee Flight Simulation and Throw Biomechanics" University of California, Davis, 2003.
 
-The [Morrison](src/flying_discs/morrison) model is a Euler approximation of [S. A. Hummel, Frisbee Flight Simulation and Throw Biomechanics. University of California, Davis, 2003.](https://books.google.ch/books?id=KQlA7DJ323MC)
+The base model for calculation of a flying discs trajectory. The model was researched by L.Hannah in [L. Hannah, Constraining Frisbee Tracking Methods Through Bayesian Analysis of Flying Disc Models 2017.]
+She and her initiator T. McClintock initial published the code in the repository [Frisbee_Simulator](https://github.com/tmcclintock/Frisbee_Simulator). Recently this was re-written in a Python library [FrisPy](https://github.com/tmcclintock/FrisPy). The library solves the models ODE, allowing for increased parameterizations and precision.
+
+
+#### V. Morrison, “The physics of frisbees” Mount Allison University Physics Department, vol. 1, 2005.
+
+The [Morrison](src/flying_discs/morrison) model is a Euler approximation of [S. A. Hummel, Frisbee Flight Simulation and Throw Biomechanics. University of California, Davis, 2003.](https://books.google.ch/books?id=KQlA7DJ323MC) using constants.
 
 ##### Constants
 
 - **G. Stilley and D. Carstens**, “Adaptation of the Frisbee flight principle to delivery of special ordnance,” in 2nd Atmospheric Flight Mechanics Conference, in Guidance, Navigation, and Control and Co-located Conferences. American Institute of Aeronautics and Astronautics, 1972. doi: 10.2514/6.1972-982.
 - **K. Yasuda**, “Flight and aerodynamic characteristics of a flying disk,” Japanese Soc. Aero. Space Sci, vol. 47, no. 547, pp. 16–22, 1999.
 - **S. A. Hummel**, Frisbee Flight Simulation and Throw Biomechanics. University of California, Davis, 2003.
-- **V. Morrison**, “The physics of frisbees,” Mount Allison University Physics Department, vol. 1, 2005.
+- **V. Morrison**, “The physics of frisbees” Mount Allison University Physics Department, vol. 1, 2005.
 - **W. J. Crowther** and J. R. Potts, “Simulation of a spin-stabilised sports disc,” Sports Engineering, vol. 10, no. 1, pp. 3–21, 2007.
 - **L. Hannah**, “Constraining Frisbee Tracking Methods Through Bayesian Analysis of Flying Disc Models,” 2017.
 
 
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 ## 🚀 Get Started
 
 #### Installation