To cite package ‘PRIMME’ in publications use:

  Stathopoulos A, McCombs J (2010). “PRIMME: PReconditioned Iterative
  MultiMethod Eigensolver - Methods and software description.” _ACM
  Transactions on Mathematical Software_, *37*(2), 21:1-21:30.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{PRIMME}: {PR}econditioned {I}terative {M}ulti{M}ethod {E}igensolver -- Methods and software description},
    author = {Andreas Stathopoulos and James R. McCombs},
    journal = {ACM Transactions on Mathematical Software},
    volume = {37},
    number = {2},
    pages = {21:1--21:30},
    year = {2010},
    publisher = {ACM},
  }

  Wu L, Romero E, Stathopoulos A (2017). “PRIMME\_SVDS: A
  High-Performance Preconditioned SVD Solver for Accurate Large-Scale
  Computations.” _SIAM J. Sci. Comput._, *39*(5), S248-S271.
  <https://doi.org/10.1137/16M1082214>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{PRIMME\_SVDS}: A High-Performance Preconditioned {SVD} Solver for Accurate Large-Scale Computations},
    author = {Lingfei Wu and Eloy Romero and Andreas Stathopoulos},
    journal = {SIAM J. Sci. Comput.},
    volume = {39},
    number = {5},
    pages = {S248--S271},
    year = {2017},
    url = {https://doi.org/10.1137/16M1082214},
  }