| article html file updated | 7 February 2020 21:32 CET | Update | https://www.mdpi.com/2076-3263/7/1/4 |
| article html file updated | 4 May 2019 15:07 CEST | Update | - |
| article html file updated | 25 July 2017 10:20 CEST | Update | - |
| article html file updated | 16 January 2017 10:06 CET | Original file | - |
| article xml uploaded. | 16 January 2017 10:05 CET | Original file | https://www.mdpi.com/2076-3263/7/1/4/xml |
| article pdf uploaded. | 16 January 2017 10:05 CET | Version of Record | https://www.mdpi.com/2076-3263/7/1/4/pdf |
