1. Fletcher, K: Mars Express − the scientific investigations. ESA, Noordwijk, 2009, SP 1291.
2. Kargel, Jeffrey: Mars − a warmer, wetter planet. Praxis/Springer, 2004.
3. Wilson, Colin & Ghail, Richard: Life after Venus Express; and Wilson Colin et al: A dynamic atmosphere revealed by the Venus Express mission. Papers presented 40th COSPAR conference, Moscow, August 2014.
4. For the early history, see ESA at Mars. Spaceflight, vol 58, #3, March 2016; Marlow, Jeffrey: Seeking ET − ExoMars and the continuing search for life on Mars. Spaceflight, vol 51, #4, April 2009 ; and the research of Anatoly Zak at www.russianspaceweb.com.
5. Lakdawalla, Emily: The design and engineering of Curiosity − how the Mars rover performs its job. Cham, Springer-Praxis, 2018.