One of those sources, for finding which blogs link to your blog, is The Truth Laid Bear Blog Ecosystem.
The purpose of the The Truth Laid Bear Blog Ecosystem is to create a list of blogs, ranked by the number of their incoming links. The more incoming links, the higher a blog ranks on the Ecosystem.
In a take off on the evolutionary scale, the blogs begin their journey onward and upward on the evolutionary ladder.
The lowest level, for blogs with no incoming blog links is "Insignificant Microbes". Typically, these are brand new blogs who have not yet found their audience. As blogs begin to link to them, they begin to evolve into higher organisms.
There are sixteen stages in the The Truth Laid Bear Blog Ecosystem, with "Higher Beings" providing the ultimate level of blogs. That group is populated by the biggest names in the blogging community, or the well known "A List".
You will want to find your blog's level in the Ecosystem. For example, Blog Business World is called a "Marauding Marsupial".
I didn't make those category names up!
The Ecosystem scans all of the blogs, found within its blog database, each day. The crawl examines all mentions of a blog, whether within a blog posting, on a blogroll, or a blog's list of links.
Note that only the front page of a blog is scanned, so once a blog post that mentions a blog scrolls off into the archives, it is often no longer counted. Frequent mentions and inclusion on a blogroll pay added dividends in the Ecosystem.
To get your blog scanned, for inclusion in the index, go to the Add Your Weblog page. All that is required is your blog title and URL. That is a fairly basic, and not too onerous a task.
You can add a bit of code to your blog, provided by the Ecosystem, which automatically updates itself as your blog evolves higher in the food chain.
One of the major weaknesses of the The Truth Laid Bear Blog Ecosystem, is it doesn't include the entire blog population.
Its reach is far smaller than the better known Technorati. For that reason, your incoming blog count may appear to be smaller than that displayed in the Technorati results.
I would suggest helping The Truth Laid Bear Blog Ecosystem out a bit.
Here's what I do.
Whenever a new blog links to one of mine, I go to the Add Your Weblog page, and add their blog. Quite often, their blog will show up as not being included in the system.
By adding the new blog to the The Truth Laid Bear Blog Ecosystem, I accomplish a number of things.
I get another incoming link counted. That's obvious.
I help out the work done on behalf of bloggers by The Truth Laid Bear Blog Ecosystem. That's obvious too.
What is less obvious, is I am helping out the person who linked to my blog.
Because the Google PageRank of the The Truth Laid Bear Blog Ecosystem is fairly high at PageRank 6, its links to blogs appear in the Google backlink display.
That extra incoming PR4 or higher link helps the blogger who linked to me get higher Google PageRank and better positioning in the search engine results for their most important keywords.
I consider my addition of a blog a help to that blogger.
It's one way of thanking them for linking to one or more of my blogs.