Figure 1.
Publication history of CEE SEMs indicating the number of maps published per year. The year in which the CEE guidance on systematic mapping methods was published (2016) is marked on the corresponding bar (James et al., 2016).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.