| article html file updated | 7 February 2020 07:35 CET | Update | https://www.mdpi.com/2304-6732/3/2/21 |
| article html file updated | 5 May 2019 17:59 CEST | Update | - |
| article html file updated | 27 March 2019 02:32 CET | Update | - |
| article html file updated | 1 July 2016 13:32 CEST | Update | - |
| article html file updated | 21 April 2016 08:30 CEST | Original file | - |
| article xml uploaded. | 21 April 2016 08:28 CEST | Original file | https://www.mdpi.com/2304-6732/3/2/21/xml |
| article pdf uploaded. | 21 April 2016 08:28 CEST | Version of Record | https://www.mdpi.com/2304-6732/3/2/21/pdf |
