This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. Management Science and Operations Research Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values. The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles.