| article html file updated | 8 February 2020 02:33 CET | Update | https://www.mdpi.com/2073-431X/6/2/13 |
| article html file updated | 24 September 2019 01:59 CEST | Update | - |
| article html file updated | 4 May 2019 04:22 CEST | Update | - |
| article html file updated | 28 June 2017 12:58 CEST | Update | - |
| article html file updated | 30 March 2017 10:57 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 10:53 CEST | Update | https://www.mdpi.com/2073-431X/6/2/13/xml |
| article pdf uploaded. | 30 March 2017 10:53 CEST | Version of Record | https://www.mdpi.com/2073-431X/6/2/13/pdf |
