Biblio
, “POSITIVE SOLUTION FOR A SECOND ORDER BVP WITH SINGULAR SIGN-CHANGING NONLINEARITY”, Communications in Applied Analysis, vol. 20, no. 1, p. 16, 2016.
, “POSITIVE SOLUTIONS FOR SYSTEMS OF SECOND ORDER FOUR-POINT NONLINEAR BOUNDARY VALUE PROBLEMS”, vol. 12, no. 1, p. 12, 2008.
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