| article html file updated | 8 February 2020 08:02 CET | Update | https://www.mdpi.com/2076-0760/6/2/61 |
| article html file updated | 25 September 2019 07:05 CEST | Update | - |
| article html file updated | 3 May 2019 17:56 CEST | Update | - |
| article html file updated | 13 June 2017 04:49 CEST | Original file | - |
| article xml uploaded. | 13 June 2017 04:48 CEST | Original file | https://www.mdpi.com/2076-0760/6/2/61/xml |
| article pdf uploaded. | 13 June 2017 04:48 CEST | Updated version of record | https://www.mdpi.com/2076-0760/6/2/61/pdf |
| article pdf uploaded. | 11 June 2017 10:23 CEST | Version of Record | https://www.mdpi.com/2076-0760/6/2/61/pdf-vor |
