Please cite the SPLASH publication in Nature Biotechnology:

  Wohlgemuth, G., Mehta, S. S., Mejia, R. F., Neumann, S., Pedrosa, D.,
  Pluskal, T., Schymanski, E. L., Willighagen, E. L., Wilson, M.,
  Wishart, D. S., Arita, M., Dorrestein, P. C., Bandeira, N., Wang, M.,
  Schulze, T., Salek, R. M., Steinbeck, C., Nainala, V. C., Mistrik,
  R., Nishioka, T., Fiehn, O., Nov. 2016. SPLASH, a hashed identifier
  for mass spectra. Nature Biotechnology 34 (11), 1099-1101

A BibTeX entry for LaTeX users is

  @Article{,
    author = {G Wohlgemuth and SS Mehta and RF Meija and S Neumann and D Pedrosa and T Pluskal and EL Schymanski and EL Willighagen and M Wilson and DS Wishart and M Arita and PC Dorrestein and N Bandeira and M Wang and T Schulze and RM Salek and C Steinbeck and VC Nainala and R Mistrik and T Nishioka and O Fiehn},
    journal = {Nature Biotechnology},
    month = {11},
    pages = {1099--1101},
    volume = {34},
    number = {11},
    title = {{SPLASH}, a hashed identifier for mass spectra},
    year = {2016},
    note = {http://doi.org/10.1038/nbt.3689},
  }