Update README.md

README.md

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 * [RRT-Connect: ](http://www-cgi.cs.cmu.edu/afs/cs/academic/class/15494-s12/readings/kuffner_icra2000.pdf) RRT-Connect: An Efficient Approach to Single-Query Path Planning
 * [Extended-RRT: ](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1.7617&rep=rep1&type=pdf) Real-Time Randomized Path Planning for Robot Navigation
 * [Dynamic-RRT: ](https://www.ri.cmu.edu/pub_files/pub4/ferguson_david_2006_2/ferguson_david_2006_2.pdf) Replanning with RRTs
-* [RRT*](https://journals.sagepub.com/doi/abs/10.1177/0278364911406761) Sampling-based algorithms for optimal motion planning
-* [Bidirectional-RRT*](https://dspace.mit.edu/bitstream/handle/1721.1/79884/MIT-CSAIL-TR-2013-021.pdf) Optimal Bidirectional Rapidly-Exploring Random Trees
-* [RRT*-Smart](http://save.seecs.nust.edu.pk/pubs/ICMA2012.pdf) Rapid convergence implementation of RRT* towards optimal solution
-* [Anytime-RRT](https://dspace.mit.edu/handle/1721.1/63170) Anytime Motion Planning using the RRT*
-* [Closed-loop RRT (CL-RRT)](http://acl.mit.edu/papers/KuwataTCST09.pdf) Real-time Motion Planning with Applications to Autonomous Urban Driving
-* [Spline-RRT*](https://ieeexplore.ieee.org/abstract/document/6987895?casa_token=B9GUwVDbbncAAAAA:DWscGFLIa97ptgH7NpUQUL0A2ModiiBDBGklk1z7aDjI11Kyfzo8rpuFstdYcjOofJfCjR-mNw) Optimal path planning based on spline-RRT* for fixed-wing UAVs operating in three-dimensional environments
-* [LQR-RRT*](https://lis.csail.mit.edu/pubs/perez-icra12.pdf) Optimal Sampling-Based Motion Planning with Automatically Derived Extension Heuristics
+* [RRT*: ](https://journals.sagepub.com/doi/abs/10.1177/0278364911406761) Sampling-based algorithms for optimal motion planning
+* [Bidirectional-RRT*: ](https://dspace.mit.edu/bitstream/handle/1721.1/79884/MIT-CSAIL-TR-2013-021.pdf) Optimal Bidirectional Rapidly-Exploring Random Trees
+* [RRT*-Smart: ](http://save.seecs.nust.edu.pk/pubs/ICMA2012.pdf) Rapid convergence implementation of RRT* towards optimal solution
+* [Anytime-RRT: ](https://dspace.mit.edu/handle/1721.1/63170) Anytime Motion Planning using the RRT*
+* [Closed-loop RRT (CL-RRT): ](http://acl.mit.edu/papers/KuwataTCST09.pdf) Real-time Motion Planning with Applications to Autonomous Urban Driving
+* [Spline-RRT*: ](https://ieeexplore.ieee.org/abstract/document/6987895?casa_token=B9GUwVDbbncAAAAA:DWscGFLIa97ptgH7NpUQUL0A2ModiiBDBGklk1z7aDjI11Kyfzo8rpuFstdYcjOofJfCjR-mNw) Optimal path planning based on spline-RRT* for fixed-wing UAVs operating in three-dimensional environments
+* [LQR-RRT*: ](https://lis.csail.mit.edu/pubs/perez-icra12.pdf) Optimal Sampling-Based Motion Planning with Automatically Derived Extension Heuristics