Controlled nucleation of point defects on a disclination line near a free surface during smectic-A–to–nematic directional melting J. Ignés-Mullol, L. Scurtu and P. OswaldEur. Phys. J. E, 10 3 (2003) 281-288DOI: https://doi.org/10.1140/epje/i2002-10116-y