| article html file updated | 7 February 2020 07:13 CET | Update | https://www.mdpi.com/2072-6643/8/4/221 |
| article html file updated | 5 May 2019 18:44 CEST | Update | - |
| article html file updated | 27 March 2019 01:47 CET | Update | - |
| article html file updated | 28 April 2016 09:27 CEST | Update | - |
| article html file updated | 13 April 2016 11:50 CEST | Original file | - |
| article xml uploaded. | 13 April 2016 11:49 CEST | Update | https://www.mdpi.com/2072-6643/8/4/221/xml |
| article pdf uploaded. | 13 April 2016 11:49 CEST | Version of Record | https://www.mdpi.com/2072-6643/8/4/221/pdf |
