| article html file updated | 8 February 2020 06:39 CET | Update | https://www.mdpi.com/2297-8739/4/2/20 |
| article html file updated | 25 September 2019 00:03 CEST | Update | N/A |
| article html file updated | 3 May 2019 20:31 CEST | Update | N/A |
| article html file updated | 30 June 2017 09:14 CEST | Update | N/A |
| article html file updated | 24 May 2017 16:28 CEST | Original file | N/A |
| article xml uploaded. | 24 May 2017 16:27 CEST | Original file | https://www.mdpi.com/2297-8739/4/2/20/xml |
| article pdf uploaded. | 24 May 2017 16:27 CEST | Version of Record | https://www.mdpi.com/2297-8739/4/2/20/pdf |
