TY - JOUR AU - Robert Parson BT - Journal of Chemical Education DA - 02/1993 DO - 10.1021/ed070p115 PY - 1993 EP - 115 T2 - Journal of Chemical Education TI - Visualizing the Variation Principle: An Intuitive Approach to Interpreting the Theorem in Geometric Terms VL - 70 SN - 0021-9584 ER -