<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>L</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn mathvariant="normal">2,1</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>-Labeling of the Strong Product of Paths and Cycles
The scientific world journal/TheScientificWorldjournal