| article html file updated | 7 February 2020 07:14 CET | Update | https://www.mdpi.com/1422-0067/17/4/556 |
| article html file updated | 5 May 2019 18:42 CEST | Update | - |
| article html file updated | 27 March 2019 01:49 CET | Update | - |
| article html file updated | 28 April 2016 05:16 CEST | Update | - |
| article html file updated | 13 April 2016 12:59 CEST | Original file | - |
| article xml uploaded. | 13 April 2016 12:57 CEST | Original file | https://www.mdpi.com/1422-0067/17/4/556/xml |
| article pdf uploaded. | 13 April 2016 12:57 CEST | Version of Record | https://www.mdpi.com/1422-0067/17/4/556/pdf |
