Dani, S. G. A proof of Margulis’ theorem on values of quadratic forms, independent of the axiom of choice. (English) Zbl 0816.11039 Enseign. Math., II. Sér. 40, No. 1-2, 49-58 (1994). Reviewer: R.Sehmi (Chandigarh) MSC: 11H55 PDFBibTeX XMLCite \textit{S. G. Dani}, Enseign. Math. (2) 40, No. 1--2, 49--58 (1994; Zbl 0816.11039)
Dani, S. G.; Margulis, G. A. Values of quadratic forms at integral points: An elementary approach. (English) Zbl 0833.11026 Enseign. Math., II. Sér. 36, No. 1-2, 143-174 (1990). MSC: 11H55 22E40 PDFBibTeX XMLCite \textit{S. G. Dani} and \textit{G. A. Margulis}, Enseign. Math. (2) 36, No. 1--2, 143--174 (1990; Zbl 0833.11026)