| article html file updated | 8 February 2020 01:39 CET | Update | https://www.mdpi.com/2218-1997/3/1/26 |
| article html file updated | 4 May 2019 06:17 CEST | Update | - |
| article html file updated | 30 March 2017 03:37 CEST | Update | - |
| article html file updated | 17 March 2017 09:46 CET | Original file | - |
| article xml uploaded. | 17 March 2017 09:45 CET | Original file | https://www.mdpi.com/2218-1997/3/1/26/xml |
| article pdf uploaded. | 17 March 2017 09:45 CET | Version of Record | https://www.mdpi.com/2218-1997/3/1/26/pdf |
