Global Optimization of Gas Lifting Operations: A Comparative Study of Piecewise Linear Formulations 2009 (1) R. Misener, C. E. Gounaris, C. A. Floudas, Global Optimization of Gas Lifting Operations: A Comparative Study of Piecewise Linear Formulations, Industrial and Engineering Chemistry Research, volume 48, pp.6098 - 6104, 2009