GCS - Global Citation Score shows the Citation Frequency based on the total count in the Web of Science. LCR - Local Cited References shows the count of cited papers within the collection. LCS - Local Citation Score shows the Citation Frequency within the
M. Welch, U. Schonfeld, D. He, and J. Cho. Proceedings of the fourth ACM international conference on Web search and data mining, page 327--336. New York, NY, USA, ACM, (2011)