The category
Science: Physics 250
is the most commonly referenced area in studies that cite this article. The first research to cite this article was titled
The wave equation in conformal space and was published in 1936. The most recent citation comes from a 2024 study titled
Celestial holography: An asymptotic symmetry perspective. This article reached its peak citation in 2020, with 22 citations. It has been cited in 80 different journals,
12% of which are open access. Among related journals, the
Journal of High Energy Physics cited this research the most, with 99 citations. The chart below illustrates the annual citation trends for this article.