Physics Reports 379, 257–426. Sections 10–11 address the mass interpretation and tails, with the authors' explicit defence of macroscopic localization.
Unified dynamics for microscopic and macroscopic systems by Giancarlo Ghirardi and others 2026-10-24
Physical Review D 34, 470–491. Original spontaneous-localization model with a rare microscopic rate and macroscopic amplification.