There are some sparse examples https://doi.org/10.1016/j.procs.2019.08.210 https://doi.org/10.1016/j.procs.2019.08.210 https://doi.org/10.48550/arXiv.1811.041

There are some sparse examples https://doi.org/10.1016/j.procs.2019.08.210 https://doi.org/10.1016/j.procs.2019.08.210 https://doi.org/10.48550/arXiv.1811.04115 https://doi.org/10.48550/arXiv.1811.04115 https://doi.org/10.3390/s20164587 https://doi.org/10.3390/s20164587