6. Depreciation, amortisation and impairment expenses

(in thousands of euros)	2018	2017
Contract-related assets	1,287	1,357
ICT development	8,717	8,349
Software licences	7,629	6,995
Intangible assets	17,633	16,701

Runways, taxiways and aprons	28,854	27,221
Paved areas and roads	13,159	13,141
Buildings	60,457	58,589
Installations	107,856	103,993
Other assets	39,478	37,400
Assets used for operating activities	249,804	240,344

Depreciation and amortisation in relation to disposals	1,209	6,670

Impairments related to financial assets¹	314	-

Impairments	1,000	-
Impairments reversal	-3,300	-
Total depreciation, amortisation and impairments	266,660	263,715

¹Please note that comparative figures are not included since IFRS 9 was implemented as per 1 January 2018

See note 8. Intangible assets for information on the amortisation of contract-related assets and note 9. Assets used for operating activities for information on depreciation of assets. Information on impairments is provided in note 11.Investment property.

7. Other operating expenses