1. Every planar map is four colorable. Part 1, Discharging;Appel;Illinois Journal of Mathematics,1977
2. Every planar mar is four colorable. Part 2, Reducibility;Appel;Illinois Journal of Mathematics,1977
3. Improving Eötvös corrections by wide-band noise Kalman filtering;Bashirov;Geophysical Journal International,1992
4. Potential Theory in Gravity and Magnetic Applications;Blakely,2014
5. Fundamentals in Information Theory and Coding;Borda,2011