On plasma rotation and drifting subpulses in pulsars;
using aligned pulsar B0826-34 as a voltmeter.
van Leeuwen & Timokhin 2012 (ApJ 752, 155)
The functions described and used in van Leeuwen & Timokhin 2012 (LT12) are publicly available. You are encouraged to use them for your own research; in that case kindly cite the paper.