Hämäläinen and Ilmoniemi 1984: Estimating measured magnetic fields of the brain: estimates of current distributions (PDF)
Neuromagnetism: Theory, techniques, and measurements (Ph.D. thesis of Risto Ilmoniemi, Helsinki Univ. of Technology 1985) (PDF)
Transcranial Magnetic Stimulation: Modelling and New Techniques (doctoral thesis of Jarmo Ruohonen, Helsinki Univ. of Technology 1998) (PDF HTML)