| article html file updated | 8 February 2020 04:10 CET | Update | https://www.mdpi.com/1999-4907/8/4/136 |
| article html file updated | 24 September 2019 11:06 CEST | Update | N/A |
| article html file updated | 4 May 2019 01:08 CEST | Update | N/A |
| article html file updated | 28 April 2017 06:45 CEST | Update | N/A |
| article html file updated | 22 April 2017 11:19 CEST | Original file | N/A |
| article xml uploaded. | 22 April 2017 11:18 CEST | Original file | https://www.mdpi.com/1999-4907/8/4/136/xml |
| article pdf uploaded. | 22 April 2017 11:18 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/4/136/pdf |
