| article html file updated | 7 February 2020 02:50 CET | Update | https://www.mdpi.com/2079-3197/4/1/2 |
| article html file updated | 6 May 2019 03:40 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:28 CET | Update | N/A |
| article html file updated | 29 March 2016 11:13 CEST | Update | N/A |
| article html file updated | 29 March 2016 07:35 CEST | Original file | N/A |
| article pdf uploaded. | 29 December 2015 13:13 CET | Version of Record | https://www.mdpi.com/2079-3197/4/1/2/pdf |
| article xml uploaded. | 29 December 2015 13:13 CET | Original file | https://www.mdpi.com/2079-3197/4/1/2/xml |
