| article html file updated | 8 February 2020 03:25 CET | Update | https://www.mdpi.com/2073-4441/9/4/270 |
| article html file updated | 24 September 2019 06:49 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:31 CEST | Update | N/A |
| article html file updated | 28 April 2017 11:26 CEST | Update | N/A |
| article html file updated | 14 April 2017 07:58 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2017 07:57 CEST | Original file | https://www.mdpi.com/2073-4441/9/4/270/xml |
| article pdf uploaded. | 14 April 2017 07:57 CEST | Updated version of record | https://www.mdpi.com/2073-4441/9/4/270/pdf |
