Tchumatchenko, Tatjana Theory of neural dynamics Group, Max Planck Institute for Brain Research, Max Planck Society;
https://pubmed.ncbi.nlm.nih.gov/24742344/ (Any fulltext)
Di Bernardino, E., Leon, J., & Tchumatchenko, T. (2014). Cross-correlations and joint gaussianity in multivariate level crossing models. J. Math. Neurosci., 4: 22. doi:10.1186/2190-8567-4-22.