| The Activity-tracking paradigm in discrete-event modeling and simulation: The case of spatially continuous distributed systems Recent countries visiting this post |  |
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| The Activity-tracking paradigm in discrete-event modeling and simulation: The case of spatially continuous distributed systems Recent countries visiting this post | |
| 5 | United States |
| 4 | |
| 1 | Italy |
| 1 | France |
| 1 | Russian Federation |