| article html file updated | 8 February 2020 05:25 CET | Update | https://www.mdpi.com/2218-1997/3/2/44 |
| article html file updated | 24 September 2019 17:37 CEST | Update | N/A |
| article html file updated | 3 May 2019 22:51 CEST | Update | N/A |
| article html file updated | 30 June 2017 09:16 CEST | Update | N/A |
| article html file updated | 23 May 2017 03:55 CEST | Update | N/A |
| article html file updated | 9 May 2017 14:12 CEST | Original file | N/A |
| article xml uploaded. | 9 May 2017 14:10 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/44/xml |
| article pdf uploaded. | 9 May 2017 14:10 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/44/pdf |
