The parallelism pressure.

[1] BIHLER W, 1896, THESIS FREIBURG

[2] Measured testings on the apparent level, straight in front and level forehead. (An article on the teachings of the functional coordinate system of the facial area). [J]. PFLUGERS ARCHIV FUR DIE GESAMTE PHYSIOLOGIE DES MENSCHEN UND DER TIERE, 1921, 188 : 161 - 240

[3] FISCHER R, 1891, ARCH OPHTHALMOL-CHIC, V37, P55

[4] FUCHS W, 1921, Z PSYCHOL, V86, P1

[5] GUILLERY, 1899, PFLUGERS ARCH, V75, P466

[6] LOHMANN W, 1921, ARCH AUGENHEILKD, V88, P16

[7] Mach E., 1861, SITZUNGSBERICHTE KAI, V43, P215

[8] WERTHEIMER M, 1921, PSYCHOL FORSCHUNG, V1

[1] BIHLER W, 1896, THESIS FREIBURG

[2] Measured testings on the apparent level, straight in front and level forehead. (An article on the teachings of the functional coordinate system of the facial area). [J]. PFLUGERS ARCHIV FUR DIE GESAMTE PHYSIOLOGIE DES MENSCHEN UND DER TIERE, 1921, 188 : 161 - 240

[3] FISCHER R, 1891, ARCH OPHTHALMOL-CHIC, V37, P55

[4] FUCHS W, 1921, Z PSYCHOL, V86, P1

[5] GUILLERY, 1899, PFLUGERS ARCH, V75, P466

[6] LOHMANN W, 1921, ARCH AUGENHEILKD, V88, P16

[7] Mach E., 1861, SITZUNGSBERICHTE KAI, V43, P215

[8] WERTHEIMER M, 1921, PSYCHOL FORSCHUNG, V1