The idea was studied or mentioned by Géza Dukes, Sándor Ferenczi and Wilhelm Stekel as well as by Sigmund Freud in speaking of the originality of his inventions.
Gagasan tersebut dipelajari atau disebut oleh Adipati Géza (Géza Dukes), Sándor Ferenczi dan Wilhelm Stekel, serta Sigmund Freud saat membicarakan mengenai keaslian penemuan mereka.