| article html file updated | 8 February 2020 08:33 CET | Update | https://www.mdpi.com/2079-9284/4/2/20 |
| article html file updated | 25 September 2019 09:46 CEST | Update | N/A |
| article html file updated | 3 May 2019 16:58 CEST | Update | N/A |
| article html file updated | 17 June 2017 10:47 CEST | Original file | N/A |
| article xml uploaded. | 17 June 2017 10:46 CEST | Original file | https://www.mdpi.com/2079-9284/4/2/20/xml |
| article pdf uploaded. | 17 June 2017 10:46 CEST | Version of Record | https://www.mdpi.com/2079-9284/4/2/20/pdf |
