| article html file updated | 7 February 2020 23:12 CET | Update | https://www.mdpi.com/1999-4907/8/2/41 |
| article html file updated | 23 September 2019 06:56 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:37 CEST | Update | N/A |
| article html file updated | 28 February 2017 10:53 CET | Update | N/A |
| article html file updated | 11 February 2017 11:37 CET | Original file | N/A |
| article xml uploaded. | 11 February 2017 11:35 CET | Original file | https://www.mdpi.com/1999-4907/8/2/41/xml |
| article pdf uploaded. | 11 February 2017 11:35 CET | Version of Record | https://www.mdpi.com/1999-4907/8/2/41/pdf |
