@Article{ ROSALES_Branco:1690-1697,

author = { JOSE CARLOS ROSALES GONZALEZ and Manuel B. Branco } ,

title = { Two-Extension of a Numerical Semigroup with Embedding Dimension Two },

journal = { Communications in Algebra },

year = { 2014 },

volume = { 42 },

pages = { 1690-1697 },

doi = { http://www.tandfonline.com/doi/abs/10.1080/00927872.2012.748781#.VJQjJB0MA },

}