"elscots, l . "
differential equations and the calculus of variations: / l.. elscots - ed. - ussr : mir publishers . - ", 450p.; 22 cm."
hard cover
517. 38 els
differential equations and the calculus of variations: / l.. elscots - ed. - ussr : mir publishers . - ", 450p.; 22 cm."
hard cover
517. 38 els