A Criterion for Completeness of Degrees of Unsolvability. - Richard Friedberg (J. Symb. Log., 1957)

Efficient sorting of genomic permutations by translocation, inversion and block interchange. - Sophia Yancopoulos; Oliver Attie; Richard Friedberg (Bioinform., 2005)

Sorting Genomes with Insertions, Deletions and Duplications by DCJ. - Sophia Yancopoulos; Richard Friedberg (RECOMB-CG, 2008)

DCJ Path Formulation for Genome Transformations which Include Insertions, Deletions, and Duplications. - Sophia Yancopoulos; Richard Friedberg (J. Comput. Biol., 2009)

Long-Time Bit Storage and Retrieval without Cold Atom Technology. - Richard Friedberg; Jamal T. Manassah (Symmetry, 2022)