@Article{Depierro_1995_5262,
  author = {Depierro, A. R.},
 journal = {IEEE Transactions on Medical Image Processing},
 month = {Jan.},
 pages = {132-137},
 title = {A modified expectation maximization algorithm for penalized likelihood estimation in emission tomography},
 volume = {14},
 year = {1995},
 title_with_no_special_chars = {A modified expectation maximization algorithm for penalized likelihood estimation in emission tomography}
}