| article html file updated | 7 February 2020 23:17 CET | Update | https://www.mdpi.com/2075-4701/7/2/55 |
| article html file updated | 23 September 2019 07:22 CEST | Update | - |
| article html file updated | 4 May 2019 11:27 CEST | Update | - |
| article html file updated | 1 March 2017 03:54 CET | Update | - |
| article html file updated | 22 February 2017 08:23 CET | Original file | - |
| article xml uploaded. | 22 February 2017 08:22 CET | Original file | https://www.mdpi.com/2075-4701/7/2/55/xml |
| article pdf uploaded. | 22 February 2017 08:22 CET | Updated version of record | https://www.mdpi.com/2075-4701/7/2/55/pdf |
| article pdf uploaded. | 13 February 2017 14:34 CET | Version of Record | https://www.mdpi.com/2075-4701/7/2/55/pdf-vor |
