The h-index is an indicator proposed by Jorge Hirsch, from the University of California, in 2005. It is one of the most relevant indicators for assessing the scientific production of a researcher, comparing the number of publications by an author and the citations they receive.
Any researcher can calculate the h-index of their publications. They just need to sort them by the number of citations received in descending order, number them and identify the point at which the order number matches the number of citations received by a publication. This number is the h-index.
This h-index is available, among others, on the platforms Web of Science y Scopus.