| article html file updated | 8 February 2020 04:46 CET | Update | https://www.mdpi.com/2218-1997/3/2/38 |
| article html file updated | 24 September 2019 14:19 CEST | Update | - |
| article html file updated | 4 May 2019 00:01 CEST | Update | - |
| article html file updated | 30 June 2017 09:15 CEST | Update | - |
| article html file updated | 10 May 2017 14:15 CEST | Update | - |
| article xml uploaded. | 10 May 2017 14:14 CEST | Update | https://www.mdpi.com/2218-1997/3/2/38/xml |
| article pdf uploaded. | 10 May 2017 14:14 CEST | Updated version of record | https://www.mdpi.com/2218-1997/3/2/38/pdf |
| article html file updated | 4 May 2017 12:28 CEST | Original file | - |
| article pdf uploaded. | 4 May 2017 12:27 CEST | Updated version of record | https://www.mdpi.com/2218-1997/3/2/38/pdf-vor |
| article pdf uploaded. | 29 April 2017 14:58 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/38/pdf-vor |
