| article html file updated | 7 February 2020 06:56 CET | Update | https://www.mdpi.com/2313-0105/2/2/8 |
| article html file updated | 5 May 2019 19:23 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:13 CET | Update | N/A |
| article html file updated | 7 April 2016 11:52 CEST | Original file | N/A |
| article xml uploaded. | 7 April 2016 11:51 CEST | Original file | https://www.mdpi.com/2313-0105/2/2/8/xml |
| article pdf uploaded. | 7 April 2016 11:51 CEST | Version of Record | https://www.mdpi.com/2313-0105/2/2/8/pdf |
