1. The van der Pol System  
   David Smith, , Math. Dept., Duke University, Durham, NC  
2. Van der Pol Negative Resistance Oscillator   
   R. Victor Jones, Applied Physics, Harvard University, Cambridge, MA
3. Equation de Van der Pol  
   Physique/Informatique/Mathématiques, Lycée Comte de Foix Prada Motxilla, France  
4. The Van der Pol Equation  
   Peter Monk, Math. Dept., University of Delaware, Newark, DE  
5. Homogeneous second order ordinary differential equations  
   Peter Monk, Math. Dept., University of Delaware, Newark, DE  
6. List of figures of 6 van der Pol Oscillators  
   Jim Swift, Math. Dept., Northern Arizona Univ., Flagstaff, AZ  
7. Van der Pol oscillator - Demonstrations  
   Michael Cross, Theoretical Physics, California Institute of Technology  
8. Koper's Extended Van der Pol Model  
   Gabriel Lord , Math. Dept., Heriot-Watt University, Edinburgh , UK  
9. The Van der Pol Oscillator  
   Richard F. Martin, Physics Dept., Illinois State University, Normal, IL  
10. Van-Der-Pol's Equation  
    Jiri Kunovsky, Computer Sci., Technical University of Brno, Czech Republic
11. Chaos from Euler Solution of ODEs; Van der Pol  
    Julien Clinton Sprott, Physics Dept., University of Wisconsin, Madison, WI  
12. van der Pol Equation
    Eric Weisstein, World of Mathematics, Wolfram Research Inc., Champaign, IL  
13. The van der Pol Equation  
    Blair Fraser, Applied Math., Univ. Western Ontario, Canada  
14. Solving ODE Problems, the van der Pol equation  
    The MathWorks, Inc., Natick, MA
15. Analytical and numerical studies of the Bonhoeffer Van der Pol system  
    Belinda Barnes; Roger Grimshaw, Math. Dept., Monash University, Victoria, Australia  
16. The Van der Pol oscillator applet 1  
    Rory Yorke, Engineering, University of Cape Town, South Africa  
17. The Van der Pol oscillator applet 2  
    Rory Yorke, Engineering, University of Cape Town, South Africa  

(c) John H. Mathews 2004