1. Pulsars
   
   http: //imagine.gsfc.nasa.gov/docs/science/know_l2/...
   
   
2. PULSAR
   
   http: //astrosun.tn.cornell.edu/courses/astro201/pu...
   
   
3. Why do we study pulsars?
   
   http: //imagine.gsfc.nasa.gov/docs/ask_astro/answer...
   
   
4. Pulsars and Neutron Stars
   
   http: //imagine.gsfc.nasa.gov/docs/ask_astro/answer...
   
   
5. Neutron Stars and Pulsars - Introduction
   
   http: //imagine.gsfc.nasa.gov/docs/science/know_l1/...
   
   
6. The discovery of Pulsars
   
   http: //imagine.gsfc.nasa.gov/docs/ask_astro/answer...