| article html file updated | 8 February 2020 02:28 CET | Update | https://www.mdpi.com/2306-5338/4/2/20 |
| article html file updated | 24 September 2019 01:29 CEST | Update | - |
| article html file updated | 4 May 2019 04:33 CEST | Update | - |
| article html file updated | 31 March 2017 04:45 CEST | Original file | - |
| article xml uploaded. | 31 March 2017 04:44 CEST | Original file | https://www.mdpi.com/2306-5338/4/2/20/xml |
| article pdf uploaded. | 31 March 2017 04:44 CEST | Updated version of record | https://www.mdpi.com/2306-5338/4/2/20/pdf |
| article pdf uploaded. | 29 March 2017 17:07 CEST | Version of Record | https://www.mdpi.com/2306-5338/4/2/20/pdf-vor |
