1. Barth, W. Some properties of stable rank-2 vector bundles on ℙn. Math. Ann. 226, 125–150 (1977).
2. Barth, W. Kummer surfaces associated with the Mumford Horrocks bundle, talk at Angers (1979).
3. Beauville, A. Surfaces with many nodes (¼(5) = 31), talk at Angers (1979).
4. Catanese, F. Babbage’s conjecture, contact of surfaces, symmetrical determinant varieties and applications, preprint, Pisa, (1979).
5. Gallarati, D. Intorno ad una superficie del sesto ordine avente 63 nodi. Boll. U.M.I. Serie III, Anno VII, 392–396 (1952).