Howell, D S Extrusion of pyrophosphate into extracellular media by osteoarthritic cartilage incubates. [electronic resource] - Calcified tissue research Aug 1976 - 349-53 p. digital Publication Type: Journal Article ISSN: 0008-0594 Subjects--Topical Terms: Alkaline Phosphatase--metabolismCartilage, Articular--metabolismChondrocalcinosis--metabolismDiphosphates--metabolismHumansOsteoarthritis--metabolism