fixed more ugly

README.md

@@ -48,15 +48,6 @@ A preliminary course schedule is as follows. Extra discussion seminars can be ad
 | Lecture 5 | April 30 <br> 08:15 - 10:00| Lec 4: Linearization, Lyapunov, High gain, Sliding mode, Moving Horizon Estimation |||
 | Discussion&nbsp;4 | TBD | Exercise discussion |||
 
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-<td>[<a href="CourseMaterial/misawa1989.pdf">3</a>,                                                                                                                  
-<a                                                                                                                                                                   
-   href="CourseMaterial/walcott1987.pdf">4</a>, <a                                                                                                                   
-   href="http://www.rt.isy.liu.se/~hendeby/files/PhD1161.pdf">17 (page                                                                                               
-   55-82)</a>]<br>                                                                                                                                                   
-(<a href="CourseMaterial/StochFilter/EKF.m">EKF.m</a>, <a href="CourseMaterial/StochFilter/task1.m">task1.m</a>)</td>                                                
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 # References
 [1] Thomas Kailath, "[_Linear Systems_](https://www.fs.isy.liu.se/Edu/Courses/ObserversPhD/CourseMaterial/Kailath_coursematerial.pdf)", Prentice-Hall, 1980.