@article{10_4064_aa_29_3_299_307,
     author = {Richard Bumby},
     title = {Structure of the {Markoff} spectrum below \ensuremath{\sqrt{}}12},
     journal = {Acta Arithmetica},
     pages = {299--307},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1976},
     doi = {10.4064/aa-29-3-299-307},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-29-3-299-307/}
}