| article html file updated | 8 February 2020 08:47 CET | Update | https://www.mdpi.com/2311-5629/3/2/20 |
| article html file updated | 25 September 2019 11:00 CEST | Update | - |
| article html file updated | 15 August 2019 07:55 CEST | Update | - |
| article html file updated | 3 May 2019 16:31 CEST | Update | - |
| article html file updated | 20 June 2017 13:59 CEST | Original file | - |
| article xml uploaded. | 20 June 2017 13:58 CEST | Update | https://www.mdpi.com/2311-5629/3/2/20/xml |
| article pdf uploaded. | 20 June 2017 13:58 CEST | Version of Record | https://www.mdpi.com/2311-5629/3/2/20/pdf |
