| article html file updated | 8 February 2020 03:36 CET | Update | https://www.mdpi.com/2218-1997/3/2/36 |
| article html file updated | 24 September 2019 07:50 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:11 CEST | Update | N/A |
| article html file updated | 30 June 2017 09:15 CEST | Update | N/A |
| article html file updated | 14 April 2017 13:11 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2017 13:10 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/36/xml |
| article pdf uploaded. | 14 April 2017 13:10 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/36/pdf |
