@article {MR1934431,
	title = {General forms for minimal spectral values for a class of quadratic Pisot numbers},
	journal = {Bull. London Math. Soc.},
	volume = {35},
	number = {1},
	year = {2003},
	pages = {47{\textendash}54},
	issn = {0024-6093},
	doi = {10.1112/S0024609302001455},
	url = {http://dx.doi.org/10.1112/S0024609302001455},
	author = {Borwein, Peter and Hare, Kevin G.}
}
