Second-Order Differential Equations and Special Functions
2008 ◽
pp. 469-508
2008 ◽
Vol 49
(8)
◽
pp. 082104
◽
2011 ◽
Vol 57
(2)
◽
pp. 409-416
2015 ◽
Vol 36
(7)
◽
pp. 930-941
1972 ◽
Vol s2-5
(3)
◽
pp. 465-468
◽