[PHYS.MECA.MEFL] Physics/Mechanics/Mechanics of the fluids
[SPI.MECA.MEFL] Engineering Sciences/Mechanics/Fluids mechanics
[PHYS.ASTR.GA] Physics/Astrophysics/Galactic Astrophysics
[SDU.ASTR.GA] Sciences of the Universe/Astrophysics/Galactic Astrophysics