E. O'Callaghan, T. Gibson, H. A. Colohan, P. Buckley, D. G. Walshe, C. Larkin et al
O'Callaghan E, Gibson T, Colohan H A, Buckley P, Walshe D G, Larkin C et al.
Risk of schizophrenia in adults born after obstetric complications and their association with early onset of illness: a controlled study.
British Medical Journal 1992; 305 :1256
doi:10.1136/bmj.305.6864.1256