1 Subjects: “...unmanned surface vehicle...”

2 Subjects: “...Vehicle Routing...”

3 Subjects: “...vehicle electrification...”

4 Subjects: “...unmanned aerial vehicles...”

5 Subjects: “...unmanned aerial vehicles...”

6 Subjects: “...unmanned aerial vehicles...”

7 Subjects: “...unmanned aerial vehicles...”

8 Subjects: “...vehicle routing problem...”

9 Subjects: “...connected and autonomous vehicle...”

10 Subjects: “...unmanned aerial vehicle (UAV)...”

11 Subjects: “...unmanned aerial vehicle (UAV)...”

12 Subjects: “...plug-in electric vehicle...”

13 Subjects: “...electric vehicles (EVs)...”