| article html file updated | 8 February 2020 03:14 CET | Update | https://www.mdpi.com/2076-0787/6/2/21 |
| article html file updated | 4 May 2019 02:53 CEST | Update | N/A |
| article html file updated | 13 April 2017 05:07 CEST | Update | N/A |
| article html file updated | 12 April 2017 07:49 CEST | Update | N/A |
| article html file updated | 12 April 2017 07:28 CEST | Update | N/A |
| article html file updated | 12 April 2017 05:26 CEST | Update | N/A |
| article html file updated | 11 April 2017 11:08 CEST | Original file | N/A |
| article xml uploaded. | 11 April 2017 11:07 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/21/xml |
| article pdf uploaded. | 11 April 2017 11:07 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/2/21/pdf |
| article pdf uploaded. | 10 April 2017 10:10 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/21/pdf-vor |
