Via the also very highly cited paper (not a SB) on vacuum configurations for superstrings by Candelas et al (1985) [42 ], co-authored by the string theory pioneer Witten, and via the SB of De Wit et al (1987) on supergravity [43 ] we observe a further connection with the Romans cluster, particularly the most famous SB of Romans (1986) on supergravitation in a ten-dimensional space-time[28 ].
Source: wiktionary