Matson JL, Esveldt-Dawson K, Kazdin AE.
Ment Retard. 1982 Apr;20(2):76-81.
PMID: 7078403

Slocum SE.
Science. 1909 Jul 09;30(758):33-48. doi: 10.1126/science.30.758.33.
PMID: 17833586

Stein JD.
Science. 1987 Oct 23;238(4826):447. doi: 10.1126/science.238.4826.447-a.
PMID: 17809594

Quick AD, Campbell AA.
Ment Retard. 1977 Apr;15(2):42-6.
PMID: 853947

Murnaghan FD.
Science. 1944 Dec 01;100(2605):479-86. doi: 10.1126/science.100.2605.479.
PMID: 17734179

Steen LA.
Science. 1987 Oct 23;238(4826):447-8. doi: 10.1126/science.238.4826.447-c.
PMID: 17809592

Rickert NW.
Science. 1987 Oct 23;238(4826):447. doi: 10.1126/science.238.4826.447-b.
PMID: 17809593