TY - JOUR AU - Kramosil, Ivan TI - Statistical testing procedure for lengths of formalized proofs JO - Kybernetika PY - 1980 SP - 209 EP - 224 VL - 16 IS - 3 UR - http://geodesic.mathdoc.fr/item/KYB_1980_16_3_a0/ LA - en ID - KYB_1980_16_3_a0 ER -