Articles may be both current and historical. Articles report results of scholarly study. Articles are written for a scholarly audience. Articles include bibliographies and reference lists. Authors are generally cited with their credentials.
Articles are generally long.
Sometimes abstracts, otherwise known as summaries, appear. These can help you decide if the article will help you. The listings will include citations, which are the information you need to find the actual articles you want in the library. Witkin examines the effort to keep drugs from being brought into the US via the Mexican border. There are many different indexes for different subjects.