Look for the the font-family names below. These names are case sensitive. Add the following line at the beginning of your stylesheet:
@import url(fonts/dotmatrix.css);

NOTE: Add a slash in front of fonts/ if you are not using local fonts. After importing this style sheet into your CSS, you may use that font-family name in one or more of your own CSS rules.
[0]	/* Generated by Font Squirrel (
[4]	@font-face {
[5]	    font-family: 'DotMatrix';
[6]	    src: url('dotmatri-webfont.eot');
[7]	    src: url('dotmatri-webfont.eot?#iefix') format('embedded-opentype'),
[8]	         url('dotmatri-webfont.woff') format('woff'),
[9]	         url('dotmatri-webfont.ttf') format('truetype'),
[10]	         url('dotmatri-webfont.svg#dot_matrixregular') format('svg');
[11]	    font-weight: normal;
[12]	    font-style: normal;
[14]	}