@article{ruffhead_2022,  title={Partially-conformal variations of the Standard Molodensky datum transformation},  volume={28},  ISSN={1982-2170},  url={https://doi.org/10.1590/s1982-21702022000400021},  DOI={10.1590/s1982-21702022000400021},  number={4},  journal={Boletim de Ciências Geodésicas},  publisher={Universidade Federal do Paraná},  author={Ruffhead, Andrew Carey},  year={2022},  pages={e2022021} }