| article html file updated | 8 February 2020 12:51 CET | Update | https://www.mdpi.com/2076-0787/6/3/57 |
| article html file updated | 3 May 2019 08:19 CEST | Update | N/A |
| article html file updated | 27 March 2019 19:24 CET | Update | N/A |
| article html file updated | 5 August 2017 07:42 CEST | Original file | N/A |
| article xml uploaded. | 5 August 2017 07:41 CEST | Original file | https://www.mdpi.com/2076-0787/6/3/57/xml |
| article pdf uploaded. | 5 August 2017 07:41 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/3/57/pdf |
| article pdf uploaded. | 4 August 2017 15:56 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/3/57/pdf-vor |
