Irina Georgieva, Clemens Hofreither, R. Uluchev,
"Least Squares Fitting of Harmonic Functions Based on Radon Projections"
, in Floater, M. and Lyche, T. and Mazure, M.-L. and Mörken, K. and Schumaker, L. L.: Mathematical Methods for Curves and Surfaces, Serie Lecture Notes in Computer Science (LNCS), Vol. 8177, Springer Berlin Heidelberg, Seite(n) 158 - 171, 2014
Original Titel:
Least Squares Fitting of Harmonic Functions Based on Radon Projections