| article html file updated | 8 February 2020 02:04 CET | Update | https://www.mdpi.com/2072-6643/9/4/321 |
| article html file updated | 23 September 2019 23:20 CEST | Update | N/A |
| article html file updated | 4 May 2019 05:24 CEST | Update | N/A |
| article html file updated | 28 April 2017 11:55 CEST | Update | N/A |
| article html file updated | 27 March 2017 07:57 CEST | Original file | N/A |
| article xml uploaded. | 27 March 2017 07:56 CEST | Original file | https://www.mdpi.com/2072-6643/9/4/321/xml |
| article pdf uploaded. | 27 March 2017 07:56 CEST | Updated version of record | https://www.mdpi.com/2072-6643/9/4/321/pdf |
| article pdf uploaded. | 23 March 2017 12:00 CET | Version of Record | https://www.mdpi.com/2072-6643/9/4/321/pdf-vor |
