| article html file updated | 8 February 2020 05:50 CET | Update | https://www.mdpi.com/2076-0787/6/2/31 |
| article html file updated | 3 May 2019 22:06 CEST | Update | N/A |
| article html file updated | 23 May 2017 04:13 CEST | Update | N/A |
| article html file updated | 16 May 2017 05:12 CEST | Original file | N/A |
| article xml uploaded. | 16 May 2017 05:11 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/31/xml |
| article pdf uploaded. | 16 May 2017 05:11 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/2/31/pdf |
| article pdf uploaded. | 14 May 2017 08:32 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/31/pdf-vor |
