| article html file updated | 7 February 2020 04:37 CET | Update | https://www.mdpi.com/2218-2004/4/1/6 |
| article html file updated | 6 May 2019 00:12 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:51 CET | Update | N/A |
| article html file updated | 29 March 2016 07:14 CEST | Original file | N/A |
| article pdf uploaded. | 18 February 2016 07:31 CET | Updated version of record | https://www.mdpi.com/2218-2004/4/1/6/pdf |
| article pdf uploaded. | 18 February 2016 07:30 CET | Updated version of record | https://www.mdpi.com/2218-2004/4/1/6/pdf-vor |
| article xml uploaded. | 18 February 2016 07:30 CET | Update | https://www.mdpi.com/2218-2004/4/1/6/xml |
| article pdf uploaded. | 17 February 2016 04:27 CET | Version of Record | https://www.mdpi.com/2218-2004/4/1/6/pdf-vor |
| article xml uploaded. | 17 February 2016 04:27 CET | Original file | N/A |
