P, ρ, T and heat capacity measurements of (α-pinene + β-pinene) mixtures over the temperature range 283.15 K to 358.15 K and pressures up to 40 MPa: Experiments and modelling Langa, E.; Palavra, A.M.; Lourenço, M.J.; Nieto de Castro, C.A.; Mainar, A.M.; The Journal of Chemical Thermodynamics 2013, 57, 493-499