| article html file updated | 8 February 2020 04:57 CET | Update | https://www.mdpi.com/2313-0105/3/2/15 |
| article html file updated | 24 September 2019 15:17 CEST | Update | N/A |
| article html file updated | 3 May 2019 23:41 CEST | Update | N/A |
| article html file updated | 23 May 2017 03:35 CEST | Update | N/A |
| article html file updated | 3 May 2017 13:32 CEST | Original file | N/A |
| article xml uploaded. | 3 May 2017 13:31 CEST | Original file | https://www.mdpi.com/2313-0105/3/2/15/xml |
| article pdf uploaded. | 3 May 2017 13:31 CEST | Version of Record | https://www.mdpi.com/2313-0105/3/2/15/pdf |
