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

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

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

4 Subjects: “...electric vehicles...”

5 Subjects: “...unmanned aerial vehicle swarm...”

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

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

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

9 Subjects: “...electric vehicles...”

10 Subjects: “...electric vehicles...”

11 Subjects: “...capacitated vehicle routing planning...”