| article html file updated | 8 February 2020 23:41 CET | Update | https://www.mdpi.com/2311-5521/2/4/68 |
| article html file updated | 2 May 2019 09:25 CEST | Update | - |
| article html file updated | 18 April 2019 07:08 CEST | Update | - |
| article html file updated | 2 January 2018 12:30 CET | Update | - |
| article html file updated | 11 December 2017 12:31 CET | Original file | - |
| article xml uploaded. | 11 December 2017 12:30 CET | Update | https://www.mdpi.com/2311-5521/2/4/68/xml |
| article xml uploaded. | 11 December 2017 12:30 CET | Original file | - |
| article pdf uploaded. | 11 December 2017 12:30 CET | Version of Record | https://www.mdpi.com/2311-5521/2/4/68/pdf |
