Number of sessions analized: 69179 (we exclude session that access less than 2 papers or articles)
ucpjnlbusv:48:y:1975:i:2:p:213-41 (2 access)
| ucpjnlbusv:50:y:1977:i:2:p:208-15 | access 1 | commun 1 | relatness 0.5 |
| ucpjnlbusv:64:y:1991:i:2:p:255-67 | access 1 | commun 1 | relatness 0.5 |