Assessing the Optimality of LinDist3Flow for Optimal Tap Selection of Step Voltage Regulators in Unbalanced Distribution Networks. - Krishna Sandeep Ayyagari; Sherin Ann Abraham; Yiyun Yao; Shibani Ghosh; Francisco Flores-Espino; Adarsh Nagarajan; Nikolaos Gatsis (CDC, 2022)