1. The non-linear differential equation y″ + p(x)y + cy−3 = 0;Pinney,1950
2. Equations equivalent to a linear differential equation;Thomas,1952
3. The equivalence of linear and non-linear equations;Herbst,1956
4. Some Non-linear Systems of Differential Equations Equivalent to Linear Systems;Dressel,1963
5. Non-linear differential equations and terrestrial brachistochrone;Despautz;American Institute of Aeronautics and Astronautics Journal,1969