| article html file updated | 8 February 2020 23:01 CET | Update | https://www.mdpi.com/2304-6740/5/4/87 |
| article html file updated | 28 September 2019 23:07 CEST | Update | - |
| article html file updated | 2 May 2019 10:54 CEST | Update | - |
| article html file updated | 18 April 2019 08:32 CEST | Update | - |
| article html file updated | 2 January 2018 13:57 CET | Update | - |
| article html file updated | 4 December 2017 12:09 CET | Original file | - |
| article xml uploaded. | 4 December 2017 12:07 CET | Original file | https://www.mdpi.com/2304-6740/5/4/87/xml |
| article pdf uploaded. | 4 December 2017 12:07 CET | Version of Record | https://www.mdpi.com/2304-6740/5/4/87/pdf |
