| article html file updated | 8 February 2020 02:49 CET | Update | https://www.mdpi.com/1422-0067/18/4/757 |
| article html file updated | 24 September 2019 03:33 CEST | Update | N/A |
| article html file updated | 4 May 2019 03:46 CEST | Update | N/A |
| article html file updated | 2 May 2017 05:56 CEST | Update | N/A |
| article html file updated | 5 April 2017 14:01 CEST | Original file | N/A |
| article xml uploaded. | 5 April 2017 14:00 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/757/xml |
| article pdf uploaded. | 5 April 2017 14:00 CEST | Updated version of record | https://www.mdpi.com/1422-0067/18/4/757/pdf |
| article pdf uploaded. | 3 April 2017 11:07 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/757/pdf-vor |
