ELLIPTIC PSEUDODIFFERENTIAL BOUNDARY VALUE PROBLEMS WITH A SMALL PARAMETER IN THE COEFFICIENT OF THE LEADING OPERATOR
- 30 April 1973
- journal article
- Published by Steklov Mathematical Institute in Mathematics of the USSR-Sbornik
- Vol. 20 (3) , 439-463
- https://doi.org/10.1070/sm1973v020n03abeh001884