| article html file updated | 8 February 2020 07:58 CET | Update | https://www.mdpi.com/2073-4441/9/6/420 |
| article html file updated | 25 September 2019 06:45 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:03 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:15 CEST | Update | N/A |
| article html file updated | 12 June 2017 11:10 CEST | Original file | N/A |
| article xml uploaded. | 12 June 2017 11:08 CEST | Original file | https://www.mdpi.com/2073-4441/9/6/420/xml |
| article pdf uploaded. | 12 June 2017 11:08 CEST | Updated version of record | https://www.mdpi.com/2073-4441/9/6/420/pdf |
| article pdf uploaded. | 10 June 2017 09:47 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/6/420/pdf-vor |
