| article html file updated | 8 February 2020 03:23 CET | Update | https://www.mdpi.com/2076-3271/5/2/7 |
| article html file updated | 24 September 2019 06:36 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:36 CEST | Update | N/A |
| article html file updated | 14 April 2017 10:23 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2017 10:21 CEST | Original file | https://www.mdpi.com/2076-3271/5/2/7/xml |
| article pdf uploaded. | 14 April 2017 10:21 CEST | Updated version of record | https://www.mdpi.com/2076-3271/5/2/7/pdf |
| article pdf uploaded. | 11 April 2017 15:16 CEST | Version of Record | https://www.mdpi.com/2076-3271/5/2/7/pdf-vor |
