The Generalized Riemann Problem for Linear Differential Equations and the Allied Problems for Linear Difference and q-Difference Equations
1913 ◽
Vol 49
(9)
◽
pp. 521
◽
2014 ◽
Vol 20
(7)
◽
pp. 1112-1126
1931 ◽
Vol 27
(1)
◽
pp. 26-36
◽
1951 ◽
Vol 47
(2)
◽
pp. 309-314
◽
2019 ◽
Vol 74
(3)
◽
pp. 121-126