@article{GDZPPN000363138, title = {On the Cone of Nonnegative Circuits.}, journal = {Discrete \& computational geometry}, volume = {1}, year = {1986}, pages = {229-240}, zbl = {0599.05039}, url = {http://dml.mathdoc.fr/item/GDZPPN000363138} }
Hoffman, A.J.; Lee, Carl W. On the Cone of Nonnegative Circuits.. Discrete & computational geometry, Tome 1 (1986) pp. 229-240. http://gdmltest.u-ga.fr/item/GDZPPN000363138/