| article html file updated | 8 February 2020 02:57 CET | Update | https://www.mdpi.com/2218-1997/3/2/34 |
| article html file updated | 24 September 2019 04:15 CEST | Update | - |
| article html file updated | 4 May 2019 03:29 CEST | Update | - |
| article html file updated | 30 June 2017 09:15 CEST | Update | - |
| article html file updated | 5 April 2017 15:23 CEST | Original file | - |
| article xml uploaded. | 5 April 2017 15:22 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/34/xml |
| article pdf uploaded. | 5 April 2017 15:22 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/34/pdf |
