Here is an example of peer reviewed journal articles that were recently added to the EconLit or the Business Source Premier databases that mention PORTLAND
EconLit with Full Text provides access to 400 scholarly journals of economics, business economics, social economics, income distributions, and monetary controls from around the world. Covers both theoretical and applied aspects of economics and allied disciplines from the social sciences. Also includes books & book reviews, essays from multi-author books, working papers, and dissertations.
Please note that "working papers" is a type of publication this is frequently found in Economics, but they are not considered to be on par with articles found in peer reviewed journals. Journal articles have passed through more rigorous editorial reviews than working papers.