Wang, Huijuan; Wu, Lidong; Wu, Weili; Pardalos, Panos; … - In: Journal of Global Optimization 60 (2014) 4, pp. 777-791
="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <mi>G</mi> </math> </EquationSource> </InlineEquation> be a planar graph …