| article html file updated | 8 February 2020 05:19 CET | Update | https://www.mdpi.com/2218-1997/3/2/42 |
| article html file updated | 24 September 2019 17:09 CEST | Update | - |
| article html file updated | 3 May 2019 23:02 CEST | Update | - |
| article html file updated | 30 June 2017 09:16 CEST | Update | - |
| article html file updated | 23 May 2017 03:52 CEST | Update | - |
| article html file updated | 8 May 2017 15:24 CEST | Original file | - |
| article xml uploaded. | 8 May 2017 15:23 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/42/xml |
| article pdf uploaded. | 8 May 2017 15:23 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/42/pdf |
