| article html file updated | 8 February 2020 07:44 CET | Update | https://www.mdpi.com/2073-4395/7/2/39 |
| article html file updated | 25 September 2019 05:39 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:28 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:22 CEST | Update | N/A |
| article html file updated | 8 June 2017 10:40 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2017 10:39 CEST | Original file | https://www.mdpi.com/2073-4395/7/2/39/xml |
| article pdf uploaded. | 8 June 2017 10:39 CEST | Version of Record | https://www.mdpi.com/2073-4395/7/2/39/pdf |
