TY  - BOOK
AU  - Gerald,Williams
TI  - Understanding boundary value problems, Weyl functions and differential operators 
SN  - 978-1-63987-547-4
AV  - QA379.U53 2021 
PY  - 2021///
CY  - New York
PB  - Murphy & Moore
KW  - Boundary value problems
KW  - Boundary value problems--Weyl theory
KW  - Differential operators
KW  - Differential equations
N1  - Includes bibliographical references and index
ER  -