| article html file updated | 8 February 2020 04:24 CET | Update | https://www.mdpi.com/2304-6740/5/2/31 |
| article html file updated | 24 September 2019 12:23 CEST | Update | - |
| article html file updated | 4 May 2019 00:43 CEST | Update | - |
| article html file updated | 30 June 2017 08:25 CEST | Update | - |
| article html file updated | 26 April 2017 16:13 CEST | Original file | - |
| article xml uploaded. | 26 April 2017 16:11 CEST | Update | https://www.mdpi.com/2304-6740/5/2/31/xml |
| article pdf uploaded. | 26 April 2017 16:11 CEST | Version of Record | https://www.mdpi.com/2304-6740/5/2/31/pdf |
