On the zeros of pairs of linear differential polynomials. Frank, G.; Langley, J.K. — 1999 Annales Academiae Scientiarum Fennicae. Mathematica
On the fixpoints, multipliers and value distribution of certain classes of meromorphic functions. Langley, J.K.; Zheng, J.H. — 1998 Annales Academiae Scientiarum Fennicae. Mathematica
On Differential Polynomials and Results of Hayman and Doeringer. J.K. Langley — 1984 Mathematische Zeitschrift
On the Value Distribution Theory of Elliptic Functions. Steven B. Bank; J.K. Langley — 1984 Monatshefte für Mathematik