| article html file updated | 7 February 2020 18:51 CET | Update | https://www.mdpi.com/2076-3263/6/4/53 |
| article html file updated | 4 May 2019 20:50 CEST | Update | - |
| article html file updated | 30 November 2016 11:07 CET | Original file | - |
| article xml uploaded. | 30 November 2016 11:06 CET | Original file | https://www.mdpi.com/2076-3263/6/4/53/xml |
| article pdf uploaded. | 30 November 2016 11:06 CET | Version of Record | https://www.mdpi.com/2076-3263/6/4/53/pdf |
