Scherer, A., John, J., Linke, R., Goody, R. S., Wittinghofer, A., Pai, E. F., et al. (1989). CRYSTALLIZATION AND PRELIMINARY-X-RAY ANALYSIS OF THE HUMAN C-H-RAS-ONCOGENE PRODUCT P21 COMPLEXED WITH GTP ANALOGS. JOURNAL OF MOLECULAR BIOLOGY, 206(1), 257-259. doi:10.1016/0022-2836(89)90540-8.