| article html file updated | 9 February 2020 17:37 CET | Update | https://www.mdpi.com/2073-431X/7/2/31 |
| article html file updated | 3 October 2019 14:27 CEST | Update | N/A |
| article html file updated | 30 April 2019 19:49 CEST | Update | N/A |
| article html file updated | 16 April 2019 20:14 CEST | Update | N/A |
| article html file updated | 30 March 2019 00:50 CET | Update | N/A |
| article html file updated | 27 June 2018 19:22 CEST | Update | N/A |
| article html file updated | 15 May 2018 10:00 CEST | Original file | N/A |
| article pdf uploaded. | 15 May 2018 09:58 CEST | Version of Record | https://www.mdpi.com/2073-431X/7/2/31/pdf |
| article xml uploaded. | 15 May 2018 09:58 CEST | Update | https://www.mdpi.com/2073-431X/7/2/31/xml |
| article xml file uploaded | 15 May 2018 09:58 CEST | Original file | N/A |
