1. N. Mertes, M. Schnabl
    String field representation of the Virasoro algebra
    Journal of High Energy Physics 1612 (2016) 151(0)-151(13).
  2. C. Maccaferri, M. Schnabl
    Large BCFT moduli in open string field theory
    Journal of High Energy Physics 1508 (2015) 149(0)-149(12).