TY - JOUR AU - Roberts, Justin TI - Classical 6j-symbols and the tetrahedron JO - Geometry & topology PY - 1999 SP - 21 EP - 66 VL - 3 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2140/gt.1999.3.21/ DO - 10.2140/gt.1999.3.21 ID - GT_1999_3_1_a1 ER -