Solubility of Rofecoxib in the Presence of Mannitol, Poly(vinylpyrrolidone) K30, Urea, Polyethylene Glycol 4000, and Polyethylene Glycol 6000 at (298.15, 303.15, and 308.15) K Liu, C.; Desai, K.G.H.; Liu, C.; Journal of Chemical & Engineering Data 2005, 50, 661-665