TIMSS Advanced 2015 international results in advanced mathematics and physics
Mullis, Ina V. S., Michael O. Martin, Pierre Foy, and Martin Hooper. “TIMSS Advanced 2015 international results in advanced mathematics and physics”, Chestnut Hill, Mass.: TIMSS & PIRLS International Study Center, Lynch School of Education, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:109287.