Herring G, Kevrekidis PG, Williams F, Christodoulakis T, Frantzeskakis DJ. From Feshbach-resonance managed Bose-Einstein condensates to anisotropic universes: Applications of the Ermakov-Pinney equation with time-dependent nonlinearity. Physics Letters, Section A: General, Atomic and Solid State Physics [Internet]. 2008;372:277-283.