1. Allen, C. E.: A chromosome difference correlated with sex differences inSphaerocarpos. Science, N.s.46, 446?467 (1917).
2. Allen, C. E.: The basis of sex inheritance inSphaerocarpos. Proc. Amer. phil. Soc.58, 219?316 (1919).
3. Allen, C. E.: Polyploidy inSphaerocarpos. Proc. 6th Internat. Congr. Gen.2, 1?2 (1932).
4. Allen, C. E.: A diploid female gametophyte ofSphaerocarpos. Proc. nat. Acad. Sci. (Wash.)20, 147?150 (1934).
5. Allen, C. E.: The occurrence of polyploidy inSphaerocarpos. Amer. J. Bot.22, 635?644 (1935).