Here's the paper cited: https://www.sciencedirect.com/science/article/abs/pii/S0921344921005103?dgcid=author https://www.sciencedirect.com/science/article/abs/p

Here's the paper cited: https://www.sciencedirect.com/science/article/abs/pii/S0921344921005103?dgcid=author https://www.sciencedirect.com/science/article/abs/pii/S09213...