Mars Express, studying Mars from orbit

Mars Orbiter Mission – MOM

Mars Express

Fly Across Mars' 'Labyrinth Of Night' With Mars Express - SpaceRef

Why we explore Mars—and what decades of missions have revealed

China's first mission to Mars

Evidence of water ice found at Mars's equator - BBC Sky at Night Magazine

Mars Express (ESA) Missions – NASA Mars Exploration

6 decades of space missions to Mars - a timeline

NASA's MAVEN enters Mars orbit to study Red Planet's atmosphere

Yes, Mars is spinning faster. Here's what NASA found.

Mars Express finds evidence of large water deposit at the Medusae Fossae Formation