A. Minne, D. Tewodrose: Asymptotic Mean Value Laplacian in Metric Measure Spaces Journal of Mathematical Analysis and Applications Vol. 491, 2020 A. Minne, D. Tewodrose: Symmetrized and non-symmetrized Asymptotic Mean Value Laplacian in metric measure spaces Proceedings of the Royal Society of Edinburgh Section A: Mathematics (Accepted Paper) 2022 V. Magnani, A. Minne: Optimal Regularity of Solutions to No-Sign Obstacle-Type Problems for the Sub-Laplacian Anal. PDE Vol. 15, N. 6, p. 1429-1456, 2022