| article html file updated | 8 February 2020 07:33 CET | Update | https://www.mdpi.com/2076-0825/6/2/20 |
| article html file updated | 25 September 2019 04:37 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:50 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:16 CEST | Update | N/A |
| article html file updated | 6 June 2017 14:30 CEST | Original file | N/A |
| article xml uploaded. | 6 June 2017 14:28 CEST | Original file | https://www.mdpi.com/2076-0825/6/2/20/xml |
| article pdf uploaded. | 6 June 2017 14:28 CEST | Version of Record | https://www.mdpi.com/2076-0825/6/2/20/pdf |
