Kapoor, Muskan, Surjeet Kaur Suneja, and Meetu Bhatia Grover. 2017. “Higher Order Optimality and Duality in Fractional Vector Optimization over Cones”. Tamkang Journal of Mathematics 48 (3):273-87. https://doi.org/10.5556/j.tkjm.48.2017.2311.