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@article{MOMA_1977__84_177830, author = {Mary E. Gbur}, title = {Accumulation {Points} of the {Lagrange} and {Markov} {Spectra.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {91--108}, publisher = {mathdoc}, volume = {84}, year = {1977}, zbl = {0372.10019}, url = {http://geodesic.mathdoc.fr/item/MOMA_1977__84_177830/} }
Mary E. Gbur. Accumulation Points of the Lagrange and Markov Spectra.. Monatshefte für Mathematik, Tome 84 (1977), pp. 91-108. http://geodesic.mathdoc.fr/item/MOMA_1977__84_177830/