Add some paper refs to the documentation

[coveralls]

Pull Request Test Coverage Report for Build 3188522038

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 7076 unchanged lines in 253 files lost coverage.
• Overall coverage decreased (-0.0002%) to 3.011%

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Files with Coverage Reduction	New Missed Lines	%
plugins/csp-anchor-labels/src/logger.cpp	1	0%
plugins/csp-atmospheres/src/logger.cpp	1	0%
plugins/csp-custom-web-ui/src/logger.cpp	1	0%
plugins/csp-fly-to-locations/src/logger.cpp	1	0%
plugins/csp-fly-to-locations/src/Plugin.hpp	1	0%
plugins/csp-lod-bodies/src/LODVisitor.hpp	1	0%
plugins/csp-lod-bodies/src/logger.cpp	1	0%
plugins/csp-lod-bodies/src/PlanetParameters.hpp	1	0%
plugins/csp-lod-bodies/src/RenderDataDEM.hpp	1	0%
plugins/csp-lod-bodies/src/RenderData.hpp	1	0%
<!--	Total:	7076		-->

Totals
Change from base Build 3180767136:	-0.0002%
Covered Lines:	491
Relevant Lines:	16306

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💛 - Coveralls