Cloning and expression of human tissue-type plasminogen activator cDNA - Pennica, D; Holmes, W E; Kohr, W J; Harkins, R N; Vehar, G A; Ward, C A; Bennet, W F; Yelverton, C; Seeburg, P H; Heynecker, H L; Goeddoel, D V; Collen, D (Nature, 1983)