| article html file updated | 8 February 2020 07:29 CET | Update | https://www.mdpi.com/2077-0375/7/2/27 |
| article html file updated | 3 May 2019 18:57 CEST | Update | - |
| article html file updated | 29 June 2017 11:37 CEST | Update | - |
| article html file updated | 5 June 2017 10:47 CEST | Original file | - |
| article xml uploaded. | 5 June 2017 10:46 CEST | Original file | https://www.mdpi.com/2077-0375/7/2/27/xml |
| article pdf uploaded. | 5 June 2017 10:46 CEST | Version of Record | https://www.mdpi.com/2077-0375/7/2/27/pdf |
