Pierre Girodias Eduard Cerny William J. Older Solving Linear, Min and Max Constraint Systems Using CLP Based on Relational Interval Arithmetic. 253-281 1997 173 Theor. Comput. Sci. 1 db/journals/tcs/tcs173.html#GirodiasCO97 http://dx.doi.org/10.1016/S0304-3975(96)00198-3