| article html file updated | 8 February 2020 02:54 CET | Update | https://www.mdpi.com/1422-0067/18/4/750 |
| article html file updated | 24 September 2019 04:00 CEST | Update | - |
| article html file updated | 4 May 2019 03:35 CEST | Update | - |
| article html file updated | 2 May 2017 05:55 CEST | Update | - |
| article html file updated | 5 April 2017 03:07 CEST | Original file | - |
| article xml uploaded. | 5 April 2017 03:06 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/750/xml |
| article pdf uploaded. | 5 April 2017 03:06 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/750/pdf |
