Subhaschandra Singh, S. 2017. Bright and dark 1– soliton solutions to perturbed Schrodinger – hirota equation with power law nonlinearity via semi – inverse variation method and ansatz method. International Journal of Physical Research. 5, 2 (Jun. 2017), 39–42. DOI:https://doi.org/10.14419/ijpr.v5i2.7795.