| article html file updated | 8 February 2020 02:19 CET | Update | https://www.mdpi.com/1999-4923/9/2/13 |
| article html file updated | 24 September 2019 00:39 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:52 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:44 CEST | Update | N/A |
| article html file updated | 27 March 2017 16:46 CEST | Original file | N/A |
| article xml uploaded. | 27 March 2017 16:45 CEST | Original file | https://www.mdpi.com/1999-4923/9/2/13/xml |
| article pdf uploaded. | 27 March 2017 16:45 CEST | Updated version of record | https://www.mdpi.com/1999-4923/9/2/13/pdf |
