Media type: E-Article Title: Estimating the expansion coefficients of a geomagnetic field model using first-order derivatives of associated Legendre functions Contributor: Bücker, H. Martin; Willkomm, Johannes imprint: Informa UK Limited, 2018 Published in: Optimization Methods and Software Language: English DOI: 10.1080/10556788.2018.1448086 ISSN: 1055-6788; 1029-4937 Keywords: Applied Mathematics ; Control and Optimization ; Software Origination: Footnote: