| article html file updated | 8 February 2020 04:11 CET | Update | https://www.mdpi.com/2311-5521/2/2/18 |
| article html file updated | 24 September 2019 11:11 CEST | Update | - |
| article html file updated | 4 May 2019 01:07 CEST | Update | - |
| article html file updated | 27 October 2017 10:10 CEST | Update | - |
| article html file updated | 22 April 2017 12:02 CEST | Original file | - |
| article xml uploaded. | 22 April 2017 12:01 CEST | Original file | https://www.mdpi.com/2311-5521/2/2/18/xml |
| article pdf uploaded. | 22 April 2017 12:01 CEST | Version of Record | https://www.mdpi.com/2311-5521/2/2/18/pdf |
