Umashankara, M.; Nanda, M.; Sonar, M.; Ganesh, K. N. 4(R/S)-Amino/Guanidino-Substituted/Proline/Peptides:/Design,/Synthesis/and/DNA/Transfection/Properties. Chimia 2012, 66 (12), 936. https://doi.org/10.2533/chimia.2012.936.