The paper titled "A Survey on Cygnian Respiratory Diseases" was a medical text dealing with the various diseases that have been known to affect the respiratory system of Cygnians. (TOS: "Obsession")

In 2371, Doctor Julian Bashir read this article during his attempt to hone his medical knowledge in an effort to impress Dr. Elizabeth Lense, who was soon to arrive on Deep Space 9 aboard the USS Lexington. (DS9: "Explorers")