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Hector SLAM for Robust Mapping in USAR Environments. http://tedusar.eu/cms/sites/tedusar.eu.cms/files/Hector_SLAM_USAR_Kohlbrecher_RRSS_Graz_2012.pdf.
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Hector SLAM’s Image Registration. https://cecas.clemson.edu/~stb/klt/lucas_bruce_d_1981_1.pdf.
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Nonlinear Least-Squares Problems with the Gauss-Newton and Levenberg-Marquardt Methods. https://www.math.lsu.edu/system/files/MunozGroup1%20-%20Presentation.pdf.
Overview Hector SLAM Paper. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.302.2579&rep=rep1&type=pdf.
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