| article html file updated | 8 February 2020 01:27 CET | Update | https://www.mdpi.com/2226-4310/4/1/15 |
| article html file updated | 23 September 2019 19:44 CEST | Update | - |
| article html file updated | 4 May 2019 06:45 CEST | Update | - |
| article html file updated | 29 March 2017 05:59 CEST | Update | - |
| article html file updated | 14 March 2017 15:17 CET | Original file | - |
| article xml uploaded. | 14 March 2017 15:16 CET | Original file | https://www.mdpi.com/2226-4310/4/1/15/xml |
| article pdf uploaded. | 14 March 2017 15:16 CET | Version of Record | https://www.mdpi.com/2226-4310/4/1/15/pdf |
