| article html file updated | 8 February 2020 09:47 CET | Update | https://www.mdpi.com/2079-9284/4/3/21 |
| article html file updated | 25 September 2019 16:29 CEST | Update | N/A |
| article html file updated | 3 May 2019 14:38 CEST | Update | N/A |
| article html file updated | 1 July 2017 03:51 CEST | Original file | N/A |
| article xml uploaded. | 1 July 2017 03:50 CEST | Original file | https://www.mdpi.com/2079-9284/4/3/21/xml |
| article pdf uploaded. | 1 July 2017 03:50 CEST | Version of Record | https://www.mdpi.com/2079-9284/4/3/21/pdf |
