| article html file updated | 8 February 2020 04:16 CET | Update | https://www.mdpi.com/2227-9717/5/2/21 |
| article html file updated | 24 September 2019 11:39 CEST | Update | - |
| article html file updated | 4 May 2019 00:58 CEST | Update | - |
| article html file updated | 29 June 2017 12:48 CEST | Update | - |
| article html file updated | 24 April 2017 12:48 CEST | Original file | - |
| article xml uploaded. | 24 April 2017 12:46 CEST | Update | https://www.mdpi.com/2227-9717/5/2/21/xml |
| article pdf uploaded. | 24 April 2017 12:46 CEST | Version of Record | https://www.mdpi.com/2227-9717/5/2/21/pdf |
