| article html file updated | 8 February 2020 09:40 CET | Update | https://www.mdpi.com/2076-3921/6/3/50 |
| article html file updated | 25 September 2019 15:46 CEST | Update | N/A |
| article html file updated | 3 May 2019 14:51 CEST | Update | N/A |
| article html file updated | 30 September 2017 11:17 CEST | Update | N/A |
| article html file updated | 30 June 2017 11:52 CEST | Update | N/A |
| article html file updated | 30 June 2017 10:50 CEST | Original file | N/A |
| article xml uploaded. | 30 June 2017 10:48 CEST | Original file | https://www.mdpi.com/2076-3921/6/3/50/xml |
| article pdf uploaded. | 30 June 2017 10:48 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/3/50/pdf |
