Bryant, R., & Gardner, R. B. (1995). Control Structures. In B. Jakubczyk, W. Respondek, & T. Rzezuchowski (Eds.), Geometry in nonlinear control and differential inclusions (Warsaw, 1993) (Vol. 12, pp. 111–121). Warsaw, Poland: Polish Academy of Sciences.

Bryant, R., and R. B. Gardner. “Control Structures.” In Geometry in Nonlinear Control and Differential Inclusions (Warsaw, 1993), edited by B. Jakubczyk, W. Respondek, and T. Rzezuchowski, 12:111–21. Warsaw, Poland: Polish Academy of Sciences, 1995.

Bryant R, Gardner RB. Control Structures. In: Jakubczyk B, Respondek W, Rzezuchowski T, editors. Geometry in nonlinear control and differential inclusions (Warsaw, 1993). Warsaw, Poland: Polish Academy of Sciences; 1995. p. 111–21.

Bryant, R., and R. B. Gardner. “Control Structures.” Geometry in Nonlinear Control and Differential Inclusions (Warsaw, 1993), edited by B. Jakubczyk et al., vol. 12, Polish Academy of Sciences, 1995, pp. 111–21.

Bryant R, Gardner RB. Control Structures. In: Jakubczyk B, Respondek W, Rzezuchowski T, editors. Geometry in nonlinear control and differential inclusions (Warsaw, 1993). Warsaw, Poland: Polish Academy of Sciences; 1995. p. 111–121.