Olver, Peter J. Differential invariants of surfaces. (English) Zbl 1164.53002 Differ. Geom. Appl. 27, No. 2, 230-239 (2009). Reviewer: Udo Simon (Berlin) MSC: 53A05 53A15 53A55 58A20 PDFBibTeX XMLCite \textit{P. J. Olver}, Differ. Geom. Appl. 27, No. 2, 230--239 (2009; Zbl 1164.53002) Full Text: DOI
Olver, Peter J. Generating differential invariants. (English) Zbl 1124.53006 J. Math. Anal. Appl. 333, No. 1, 450-471 (2007). Reviewer: Marco Modugno (Firenze) MSC: 53A55 58A15 PDFBibTeX XMLCite \textit{P. J. Olver}, J. Math. Anal. Appl. 333, No. 1, 450--471 (2007; Zbl 1124.53006) Full Text: DOI Link