APA   Click to copy
Diele, F., Marangi, C., & Ragni, S. (2006). Coupling quadrature and continuous Runge--Kutta methods for optimal control problems. Optimization Methods and Software, 21, 961–975.

Chicago/Turabian   Click to copy
Diele, Fasma, Carmela Marangi, and Stefania Ragni. “Coupling Quadrature and Continuous Runge--Kutta Methods for Optimal Control Problems.” Optimization Methods and Software 21 (2006): 961–975.

MLA   Click to copy
Diele, Fasma, et al. “Coupling Quadrature and Continuous Runge--Kutta Methods for Optimal Control Problems.” Optimization Methods and Software, vol. 21, Taylor \& Francis, 2006, pp. 961–75.

@article{diele2006a,
  title = {Coupling quadrature and continuous Runge--Kutta methods for optimal control problems},
  year = {2006},
  journal = {Optimization Methods and Software},
  pages = {961--975},
  publisher = {Taylor \& Francis},
  volume = {21},
  author = {Diele, Fasma and Marangi, Carmela and Ragni, Stefania}
}