1. A comprehensive method of determining the performance of distance relays;Neher;AIEE Transactions,1937
2. Operating experience with distance ground relays;Wolfe;AIEE Transactions,1946
3. Fundamental basis for distance relaying on 3-phase systems;Lewis;AIEE Transactions,1947
4. Operating experience with ground distance relays;Osburn;AIEE Transactions,1951
5. Some factors affecting the accuracy of distance-type protective equipment under earth fault conditions;Davison;Proceedings of the Institution of Electrical Engineers,1963