1. The Connections Between the Markov and Lagrange Spectra, Number-Theoretic Studies in the Markov Spectrum and in the Structural Theory of Set Addition;Berstein,1973
2. The Markoff and Lagrange Spectra;Cusick,1989
3. Non-coincidence of the Markov and Lagrange spectra;Freiman;Mat. Zametki,1968
4. Hyperbolicity and Sensitive Chaotic Dynamics at Homoclinic Bifurcations, Fractal Dimensions and Infinitely Many Attractors;Palis,1993