The aim of the paper is to highlight the basic research and theory issues and directions, and illustrate them with concrete research date. (doiserbia.nb.rs)
In the paper these are illustrated by concrete research subjects and approaches. (doiserbia.nb.rs)
I know having feelings like this is normal, common, and even symptomatic of prenatal depression, and my doctors have assured me these feelings are «normal» even though there isn't yet concrete research to back up why this is the case. (romper.com)