| article html file updated | 7 February 2020 03:55 CET | Update | https://www.mdpi.com/2304-6732/3/1/7 |
| article html file updated | 6 May 2019 01:39 CEST | Update | - |
| article html file updated | 26 March 2019 19:26 CET | Update | - |
| article html file updated | 6 April 2016 12:37 CEST | Original file | - |
| article pdf uploaded. | 27 January 2016 12:45 CET | Version of Record | https://www.mdpi.com/2304-6732/3/1/7/pdf |
| article xml uploaded. | 27 January 2016 12:45 CET | Original file | https://www.mdpi.com/2304-6732/3/1/7/xml |
