| article html file updated | 9 February 2020 07:28 CET | Update | https://www.mdpi.com/1999-5903/10/2/21 |
| article html file updated | 1 October 2019 00:13 CEST | Update | N/A |
| article html file updated | 1 May 2019 16:40 CEST | Update | N/A |
| article html file updated | 17 April 2019 16:04 CEST | Update | N/A |
| article html file updated | 29 March 2019 01:07 CET | Update | N/A |
| article html file updated | 14 March 2018 09:30 CET | Update | N/A |
| article html file updated | 24 February 2018 09:08 CET | Original file | N/A |
| article xml uploaded. | 24 February 2018 09:06 CET | Original file | https://www.mdpi.com/1999-5903/10/2/21/xml |
| article pdf uploaded. | 24 February 2018 09:06 CET | Version of Record | https://www.mdpi.com/1999-5903/10/2/21/pdf |
