Hajela, D.P. External Organizations; Publikationen aller ICGEM-unterstützten Projekte, Deutsches GeoForschungsZentrum;
Hajela, D. (1984): Optimal Estimation of High Degree Field from a Global Set of 1x1 Anomalies to Degree and Order 250, (Reports of the Department of Geodetic Science and Surveying ; 358), Columbus, Oh : The Ohio State University, Department of Geodetic Science, 60 p.
