| article html file updated | 8 February 2020 02:59 CET | Update | https://www.mdpi.com/2076-3921/6/2/27 |
| article html file updated | 24 September 2019 04:27 CEST | Update | - |
| article html file updated | 4 May 2019 03:23 CEST | Update | - |
| article html file updated | 28 June 2017 12:28 CEST | Update | - |
| article html file updated | 6 April 2017 08:49 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 08:48 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/27/xml |
| article pdf uploaded. | 6 April 2017 08:48 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/27/pdf |
