| article html file updated | 8 February 2020 02:28 CET | Update | https://www.mdpi.com/2306-5338/4/2/21 |
| article html file updated | 24 September 2019 01:31 CEST | Update | - |
| article html file updated | 4 May 2019 04:32 CEST | Update | - |
| article html file updated | 30 March 2017 05:59 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 05:57 CEST | Original file | https://www.mdpi.com/2306-5338/4/2/21/xml |
| article pdf uploaded. | 30 March 2017 05:57 CEST | Updated version of record | https://www.mdpi.com/2306-5338/4/2/21/pdf |
| article pdf uploaded. | 29 March 2017 17:12 CEST | Version of Record | https://www.mdpi.com/2306-5338/4/2/21/pdf-vor |
