| article html file updated | 7 February 2020 18:37 CET | Update | https://www.mdpi.com/2075-4450/7/4/68 |
| article html file updated | 4 May 2019 21:20 CEST | Update | - |
| article html file updated | 29 December 2016 04:33 CET | Update | - |
| article html file updated | 28 November 2016 10:08 CET | Update | - |
| article xml uploaded. | 28 November 2016 10:07 CET | Update | https://www.mdpi.com/2075-4450/7/4/68/xml |
| article pdf uploaded. | 28 November 2016 10:07 CET | Updated version of record | https://www.mdpi.com/2075-4450/7/4/68/pdf |
| article html file updated | 25 November 2016 13:11 CET | Original file | - |
| article xml uploaded. | 25 November 2016 13:10 CET | Original file | - |
| article pdf uploaded. | 25 November 2016 13:10 CET | Version of Record | https://www.mdpi.com/2075-4450/7/4/68/pdf-vor |
