| article html file updated | 8 February 2020 05:08 CET | Update | https://www.mdpi.com/2218-1997/3/2/40 |
| article html file updated | 3 May 2019 23:23 CEST | Update | N/A |
| article html file updated | 30 June 2017 09:16 CEST | Update | N/A |
| article html file updated | 23 May 2017 03:45 CEST | Update | N/A |
| article html file updated | 5 May 2017 12:12 CEST | Original file | N/A |
| article xml uploaded. | 5 May 2017 12:11 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/40/xml |
| article pdf uploaded. | 5 May 2017 12:11 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/40/pdf |
