| article html file updated | 8 February 2020 02:05 CET | Update | https://www.mdpi.com/1422-0067/18/4/690 |
| article html file updated | 23 September 2019 23:27 CEST | Update | - |
| article html file updated | 4 May 2019 05:22 CEST | Update | - |
| article html file updated | 2 May 2017 05:45 CEST | Update | - |
| article html file updated | 27 March 2017 05:28 CEST | Update | - |
| article html file updated | 24 March 2017 22:25 CET | Update | - |
| article html file updated | 24 March 2017 12:09 CET | Original file | - |
| article xml uploaded. | 24 March 2017 12:07 CET | Original file | https://www.mdpi.com/1422-0067/18/4/690/xml |
| article pdf uploaded. | 24 March 2017 12:07 CET | Updated version of record | https://www.mdpi.com/1422-0067/18/4/690/pdf |
| article pdf uploaded. | 23 March 2017 12:16 CET | Version of Record | https://www.mdpi.com/1422-0067/18/4/690/pdf-vor |
