%0 Journal Article %A Richard Bumby %T Structure of the Markoff spectrum below √12 %J Acta Arithmetica %D 1976 %P 299-307 %V 29 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-29-3-299-307/ %R 10.4064/aa-29-3-299-307 %G en %F 10_4064_aa_29_3_299_307