Geodesic
$W$-method for the study of variational problems (with computational aspects)
Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, no. 2 (2008), pp. 165-168

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The paper gives a survey of the recent state of the theory concerned with the $W$-substitution in quadratic variational problems, the announcement on the programming package for exact calculations for such problems and the examples of applications. 
@article{VUU_2008_2_a53,
     author = {V. Z. Tsalyuk},
     title = {$W$-method for the study of variational problems (with computational aspects)},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {165--168},
     publisher = {mathdoc},
     number = {2},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2008_2_a53/}
}
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V. Z. Tsalyuk. $W$-method for the study of variational problems (with computational aspects). Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, no. 2 (2008), pp. 165-168. http://geodesic.mathdoc.fr/item/VUU_2008_2_a53/