| article html file updated | 8 February 2020 00:25 CET | Update | https://www.mdpi.com/2073-4395/7/1/21 |
| article html file updated | 23 September 2019 13:49 CEST | Update | N/A |
| article html file updated | 4 May 2019 09:03 CEST | Update | N/A |
| article html file updated | 27 March 2017 09:48 CEST | Update | N/A |
| article html file updated | 28 February 2017 11:08 CET | Original file | N/A |
| article xml uploaded. | 28 February 2017 11:05 CET | Original file | https://www.mdpi.com/2073-4395/7/1/21/xml |
| article pdf uploaded. | 28 February 2017 11:05 CET | Version of Record | https://www.mdpi.com/2073-4395/7/1/21/pdf |
