| article html file updated | 7 February 2020 08:16 CET | Update | https://www.mdpi.com/2079-6374/6/2/21 |
| article html file updated | 5 May 2019 16:38 CEST | Update | N/A |
| article html file updated | 27 March 2019 03:54 CET | Update | N/A |
| article html file updated | 4 July 2016 08:11 CEST | Update | N/A |
| article html file updated | 6 May 2016 10:31 CEST | Original file | N/A |
| article xml uploaded. | 6 May 2016 10:29 CEST | Original file | https://www.mdpi.com/2079-6374/6/2/21/xml |
| article pdf uploaded. | 6 May 2016 10:29 CEST | Version of Record | https://www.mdpi.com/2079-6374/6/2/21/pdf |
