TY - JOUR AU - Clark, Colin TI - No applications are given, neither to physical nor mathematical topics. For far - reaching mathematical applications of related results, we refer to Multiple Integrals in the Calculus of Variations, by C.B. Morrey, Grundlehren der Math. Wiss. Vol. 130, Springer, Berlin (1966). JO - Canadian mathematical bulletin PY - 1969 SP - 102 EP - 102 VL - 12 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500030009/ DO - 10.1017/S0008439500030009 ID - 10_1017_S0008439500030009 ER -