| article html file updated | 8 February 2020 02:41 CET | Update | https://www.mdpi.com/2304-8158/6/4/26 |
| article html file updated | 24 September 2019 02:47 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:05 CEST | Update | N/A |
| article html file updated | 28 April 2017 07:57 CEST | Update | N/A |
| article html file updated | 31 March 2017 12:32 CEST | Original file | N/A |
| article xml uploaded. | 31 March 2017 12:30 CEST | Original file | https://www.mdpi.com/2304-8158/6/4/26/xml |
| article pdf uploaded. | 31 March 2017 12:30 CEST | Version of Record | https://www.mdpi.com/2304-8158/6/4/26/pdf |
