1. Beurskens, P. T., Bosman, W, P., Doesburg, H. M., van den Hark, Th., Prick, P. A. J., loordik, J. H,, Beurskens, G, Gould, R. 0., Parthasarathi, V. (1982). Conformation in Biology, Eds. R. Srinivasan, R. H. Sarma. Adenine Press, New York, pp. 389–406
2. Flippen, J. L. (l9T3). Acta Cryst. B29, 1881–1886.
3. Flippen-Anderson, J., Gilardi, R., Konnert, J. H. (1983). Program RESLSQ. NRL Memorandum Report 5042, Naval Research Laboratory, Washington, D. C. 20375, USA.
4. Hauptman, H., Karle, J. (1953). Solution of the Phase Problem. I. The Centrosymmetric Crystal. A.C.A. Monograph No. 3, Western Springs, Illinois: Polycrystal Book Service.
5. Karle, I. L., Karle, J. (1964). Acta Cryst. 17 835–841.