| article html file updated | 8 February 2020 03:53 CET | Update | https://www.mdpi.com/2076-0760/6/2/42 |
| article html file updated | 4 May 2019 01:39 CEST | Update | N/A |
| article html file updated | 19 April 2017 12:17 CEST | Original file | N/A |
| article xml uploaded. | 19 April 2017 12:16 CEST | Original file | https://www.mdpi.com/2076-0760/6/2/42/xml |
| article pdf uploaded. | 19 April 2017 12:16 CEST | Version of Record | https://www.mdpi.com/2076-0760/6/2/42/pdf |
