| article html file updated | 8 February 2020 07:49 CET | Update | https://www.mdpi.com/2076-3921/6/2/42 |
| article html file updated | 25 September 2019 06:05 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:19 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:30 CEST | Update | N/A |
| article html file updated | 8 June 2017 14:54 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2017 14:53 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/42/xml |
| article pdf uploaded. | 8 June 2017 14:53 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/42/pdf |
