ピーター・オルバー
Li, Y. A., & Olver, P. J. (2000). Well-posedness and blow-up solutions for an integrable nonlinearly dispersive model wave equation. Journal of Differential Equations, 162(1), 27-63.
Kogan, I. A., & Olver, P. J. (2003). Invariant Euler–Lagrange equations and the invariant variational bicomplex. Acta Applicandae Mathematica, 76(2), 137-193.
Olver, P. J., & Pohjanpelto, J. (2005). Maurer–Cartan forms and the structure of Lie pseudo-groups. Selecta Mathematica, 11(1), 99.
Olver, P. J., & Pohjanpelto, J. (2008). Moving frames for Lie pseudo–groups. Canadian Journal of Mathematics, 60(6), 1336-1386.