| article html file updated | 8 February 2020 01:21 CET | Update | https://www.mdpi.com/2218-1997/3/1/24 |
| article html file updated | 23 September 2019 19:10 CEST | Update | N/A |
| article html file updated | 4 May 2019 06:59 CEST | Update | N/A |
| article html file updated | 30 March 2017 03:37 CEST | Update | N/A |
| article html file updated | 13 March 2017 10:02 CET | Original file | N/A |
| article xml uploaded. | 13 March 2017 10:01 CET | Original file | https://www.mdpi.com/2218-1997/3/1/24/xml |
| article pdf uploaded. | 13 March 2017 10:01 CET | Version of Record | https://www.mdpi.com/2218-1997/3/1/24/pdf |
