The following link leads to a paper by Ellen Van Wolde that was published in the Journal for the Study of the Old Testament, Why the Verb אדב Does Not Mean ‘to Create’ in Genesis 1.1-2.4a
This article shows that the verb when used in Gen 1:1 and elsewhere in the P source of creation, does not mean "to create [ex nihilo]" but "to separate."
This article shows that the verb when used in Gen 1:1 and elsewhere in the P source of creation, does not mean "to create [ex nihilo]" but "to separate."