An explicit reference means specifically mentioning or pointing to something directly. It is a clear and obvious mention or citation of a particular thing. Full definition
We can, however, reflect on the distinctive types of experience which have been most prominent in religion and try to describe them without explicit reference to any particular religious interpretation. (religion-online.org)
Advocates are quick to acknowledge a limited number of explicit references to early learning. (ceelo.org)
I have made little explicit reference to the point of view I bring to these matters. (religion-online.org)