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Sustainability | Free Full-Text | Agile Development of Secure Software for Small and Medium-Sized Enterprises
![Aerial view over a part of the lake Vansjø in Østfold, Norway. Just below center is Årvoldtangen and the cabin called Elverhøy. In the lower part is the inlet of the river Aerial view over a part of the lake Vansjø in Østfold, Norway. Just below center is Årvoldtangen and the cabin called Elverhøy. In the lower part is the inlet of the river](https://c8.alamy.com/comp/TRBANF/aerial-view-over-a-part-of-the-lake-vansj-in-stfold-norway-just-below-center-is-rvoldtangen-and-the-cabin-called-elverhy-in-the-lower-part-is-the-inlet-of-the-river-mosseelva-the-fjord-in-the-center-is-called-vanemfjorden-and-behind-it-is-the-largest-island-in-the-lake-dilingya-vansj-is-the-largest-lake-in-stfold-the-lake-vansj-and-its-surrounding-lakes-and-rivers-are-a-part-of-the-water-system-called-morsavassdraget-the-view-is-towards-the-east-june-2006-TRBANF.jpg)
Aerial view over a part of the lake Vansjø in Østfold, Norway. Just below center is Årvoldtangen and the cabin called Elverhøy. In the lower part is the inlet of the river
![Aerial view over a part of the lake Vansjø in Østfold, Norway. This part of the lake is called Kjellerødtangen (center). In the upper left is the inlet of the narrow sound Aerial view over a part of the lake Vansjø in Østfold, Norway. This part of the lake is called Kjellerødtangen (center). In the upper left is the inlet of the narrow sound](https://c8.alamy.com/comp/TRB7DJ/aerial-view-over-a-part-of-the-lake-vansj-in-stfold-norway-this-part-of-the-lake-is-called-kjellerdtangen-center-in-the-upper-left-is-the-inlet-of-the-narrow-sound-called-nlyet-vansj-is-the-largest-lake-in-stfold-the-lake-vansj-and-its-surrounding-lakes-and-rivers-are-a-part-of-the-water-system-called-morsavassdraget-the-view-is-towards-the-southeast-october-2004-TRB7DJ.jpg)