*[http://www-math.uni-paderborn.de/~axel/aids/etiology.html The Relationship between the Human Immunodeficiency Virus and the Acquired Immunodeficiency Syndrome] (Text des National Institute of Allergy and Infectious Diseases vom September 1995, mit Anmerkungen versehen von Axel Boldt) | *[http://www-math.uni-paderborn.de/~axel/aids/etiology.html The Relationship between the Human Immunodeficiency Virus and the Acquired Immunodeficiency Syndrome] (Text des National Institute of Allergy and Infectious Diseases vom September 1995, mit Anmerkungen versehen von Axel Boldt) |