| article html file updated | 8 February 2020 03:31 CET | Update | https://www.mdpi.com/1999-5903/9/2/12 |
| article html file updated | 4 May 2019 02:20 CEST | Update | - |
| article html file updated | 30 June 2017 22:24 CEST | Update | - |
| article html file updated | 25 April 2017 18:58 CEST | Update | - |
| article xml uploaded. | 25 April 2017 18:57 CEST | Update | https://www.mdpi.com/1999-5903/9/2/12/xml |
| article pdf uploaded. | 25 April 2017 18:57 CEST | Updated version of record | https://www.mdpi.com/1999-5903/9/2/12/pdf |
| article html file updated | 14 April 2017 14:43 CEST | Original file | - |
| article pdf uploaded. | 14 April 2017 14:42 CEST | Updated version of record | - |
